diff --git a/res/layout/cats_fragment.xml b/res/layout/cats_fragment.xml
new file mode 100644
index 00000000..4101e5c8
--- /dev/null
+++ b/res/layout/cats_fragment.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8" ?>
+
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/cats_fragment.xml"
+    android:layout_width="match_parent"
+    android:layout_height="fill_parent" >
+
+    <LinearLayout android:id="@+id/loading_container" android:gravity="center" android:layout_height="match_parent" android:layout_width="match_parent">
+        <ProgressBar android:layout_width="wrap_content" style="?android:attr/progressBarStyleLarge" android:id="@+id/loading_progress" android:layout_height="wrap_content"></ProgressBar>
+        <TextView android:layout_width="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:id="@+id/loading_message" android:layout_height="wrap_content" ></TextView>
+    </LinearLayout>
+    <ListView android:id="@+id/feeds" android:layout_height="match_parent" android:layout_width="match_parent"></ListView>
+        
+    </FrameLayout>
diff --git a/res/layout/main_small.xml b/res/layout/main_small.xml
index 7fd46add..0215f270 100644
--- a/res/layout/main_small.xml
+++ b/res/layout/main_small.xml
@@ -1,30 +1,56 @@
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="fill_parent"    
-    android:layout_height="fill_parent" android:id="@+id/main_flipper">
-    <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:id="@+id/loading_container">
-        <ProgressBar android:id="@+id/loading_progress" android:layout_height="wrap_content" android:layout_width="wrap_content" ></ProgressBar>
-        <TextView android:text="@string/loading_message" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/loading_message"></TextView>
-    </LinearLayout>
-    <LinearLayout android:layout_height="fill_parent" android:orientation="horizontal" android:id="@+id/main" android:layout_width="fill_parent">
-
-        <FrameLayout
-            android:id="@+id/feeds_fragment"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent" >
-</FrameLayout>
-
-        <FrameLayout
-            android:id="@+id/headlines_fragment"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent" >
-</FrameLayout>
-
-        <FrameLayout
-            android:id="@+id/article_fragment"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent" >
-</FrameLayout>
-    </LinearLayout>
-    
-    
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/main_flipper"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent" >
+
+    <LinearLayout
+        android:id="@+id/loading_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center" >
+
+        <ProgressBar
+            android:id="@+id/loading_progress"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content" >
+        </ProgressBar>
+
+        <TextView
+            android:id="@+id/loading_message"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/loading_message" >
+        </TextView>
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/main"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent" >
+
+        <FrameLayout
+            android:id="@+id/feeds_fragment"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" >
+        </FrameLayout>
+
+        <FrameLayout
+            android:id="@+id/cats_fragment"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" >
+        </FrameLayout>
+
+        <FrameLayout
+            android:id="@+id/headlines_fragment"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" >
+        </FrameLayout>
+
+        <FrameLayout
+            android:id="@+id/article_fragment"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" >
+        </FrameLayout>
+    </LinearLayout>
+
 </FrameLayout>
\ No newline at end of file
diff --git a/res/values/strings.xml b/res/values/strings.xml
index ed26b0df..0f3b089f 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -55,4 +55,5 @@
     <string name="enable_ads_summary">Showing ads to you supports the project</string>
     <string name="ttrss_url_summary">URL of your tt-rss installation directory, e.g. http://site.com/tt-rss/</string>
     <string name="download_feed_icons">Download and display feed icons</string>
+    <string name="enable_cats">Enable feed categories</string>
 </resources>
diff --git a/res/xml/preferences.xml b/res/xml/preferences.xml
index 190a706f..dff4afdf 100644
--- a/res/xml/preferences.xml
+++ b/res/xml/preferences.xml
@@ -24,8 +24,9 @@
            android:entries="@array/pref_theme_names"
            android:entryValues="@array/pref_theme_values" android:summary="@string/pref_theme_long"/>
       
-      <CheckBoxPreference android:title="@string/sort_feeds_by_unread" android:key="sort_feeds_by_unread"/>
-      <CheckBoxPreference android:title="@string/download_feed_icons" android:key="download_feed_icons"/>
+      <CheckBoxPreference android:defaultValue="false" android:title="@string/sort_feeds_by_unread" android:key="sort_feeds_by_unread"/>
+      <CheckBoxPreference android:defaultValue="false" android:title="@string/download_feed_icons" android:key="download_feed_icons"/>
+      <CheckBoxPreference android:defaultValue="false" android:title="@string/enable_cats" android:key="enable_cats" />
       <CheckBoxPreference android:defaultValue="false" android:summary="@string/enable_ads_summary" android:title="@string/enable_ads" android:key="enable_ads" />
    </PreferenceCategory>
 
diff --git a/src/org/fox/ttrss/ArticleFragment.java b/src/org/fox/ttrss/ArticleFragment.java
index 32664fff..9fc2619b 100644
--- a/src/org/fox/ttrss/ArticleFragment.java
+++ b/src/org/fox/ttrss/ArticleFragment.java
@@ -12,7 +12,6 @@ import android.preference.PreferenceManager;
 import android.support.v4.app.Fragment;
 import android.text.Html;
 import android.text.method.LinkMovementMethod;
-import android.util.Log;
 import android.view.GestureDetector;
 import android.view.GestureDetector.SimpleOnGestureListener;
 import android.view.LayoutInflater;
diff --git a/src/org/fox/ttrss/FeedCategoriesFragment.java b/src/org/fox/ttrss/FeedCategoriesFragment.java
new file mode 100644
index 00000000..8c1cd9b5
--- /dev/null
+++ b/src/org/fox/ttrss/FeedCategoriesFragment.java
@@ -0,0 +1,316 @@
+package org.fox.ttrss;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.ListView;
+import android.widget.TextView;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.reflect.TypeToken;
+
+public class FeedCategoriesFragment extends Fragment implements OnItemClickListener, OnSharedPreferenceChangeListener {
+	@SuppressWarnings("unused")
+	private final String TAG = this.getClass().getSimpleName();
+	private SharedPreferences m_prefs;
+	private FeedCategoryListAdapter m_adapter;
+	private FeedCategoryList m_cats = new FeedCategoryList();
+	private int m_selectedCatId;
+	private OnCatSelectedListener m_catSelectedListener;
+
+	public interface OnCatSelectedListener {
+		public void onCatSelected(FeedCategory cat);
+	}
+	
+	class CatUnreadComparator implements Comparator<FeedCategory> {
+		@Override
+		public int compare(FeedCategory a, FeedCategory b) {
+			if (a.unread != b.unread)
+					return b.unread - a.unread;
+				else
+					return a.title.compareTo(b.title);
+			}
+	}
+	
+
+	class CatTitleComparator implements Comparator<FeedCategory> {
+
+		@Override
+		public int compare(FeedCategory a, FeedCategory b) {
+			if (a.id >= 0 && b.id >= 0)
+				return a.title.compareTo(b.title);
+			else
+				return a.id - b.id;
+		}
+		
+	}
+	
+	@Override
+	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {  
+		if (savedInstanceState != null) {
+			m_selectedCatId = savedInstanceState.getInt("selectedCatId");
+			m_cats = savedInstanceState.getParcelable("cats");
+		}	
+		
+		View view = inflater.inflate(R.layout.cats_fragment, container, false);
+		
+		ListView list = (ListView)view.findViewById(R.id.feeds);		
+		m_adapter = new FeedCategoryListAdapter(getActivity(), R.layout.feeds_row, (ArrayList<FeedCategory>)m_cats);
+		list.setAdapter(m_adapter);
+		list.setOnItemClickListener(this);
+		
+		if (m_cats == null || m_cats.size() == 0)
+			refresh(false);
+		else
+			view.findViewById(R.id.loading_progress).setVisibility(View.GONE);
+		
+		return view; 
+	}
+	
+	@Override
+	public void onAttach(Activity activity) {
+		super.onAttach(activity);		
+
+		m_catSelectedListener = (OnCatSelectedListener)activity;
+		
+		m_prefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
+		m_prefs.registerOnSharedPreferenceChangeListener(this);
+		
+	}
+	
+	@Override
+	public void onSaveInstanceState (Bundle out) {
+		super.onSaveInstanceState(out);
+
+		out.putInt("selectedCatId", m_selectedCatId);
+		out.putParcelable("cats", m_cats);
+	}
+
+	public void setLoadingStatus(int status, boolean showProgress) {
+		if (getView() != null) {
+			TextView tv = (TextView)getView().findViewById(R.id.loading_message);
+			
+			if (tv != null) {
+				tv.setText(status);
+			}
+			
+			View pb = getView().findViewById(R.id.loading_progress);
+			
+			if (pb != null) {
+				pb.setVisibility(showProgress ? View.VISIBLE : View.GONE);
+			}
+		}
+	}
+	
+	@SuppressWarnings("unchecked")
+	public void refresh(boolean background) {
+		CatsRequest req = new CatsRequest(getActivity().getApplicationContext());
+		
+		final String sessionId = ((MainActivity)getActivity()).getSessionId();
+		final boolean unreadOnly = ((MainActivity)getActivity()).getUnreadOnly();
+		
+		if (sessionId != null) {
+			
+			if (!background) {
+				getActivity().runOnUiThread(new Runnable() {
+					@Override
+					public void run() {
+						setLoadingStatus(R.string.blank, true);
+					}
+				});
+			}
+			
+			@SuppressWarnings("serial")
+			HashMap<String,String> map = new HashMap<String,String>() {
+				{
+					put("op", "getCategories");
+					put("sid", sessionId);
+					if (unreadOnly) {
+						put("unread_only", String.valueOf(unreadOnly));
+					}
+				}			 
+			};
+
+			req.execute(map);
+		
+		}
+	}
+	
+	private class CatsRequest extends ApiRequest {
+		
+		public CatsRequest(Context context) {
+			super(context);
+		}
+
+		protected void onPostExecute(JsonElement result) {
+			if (result != null) {
+				try {			
+					JsonObject rv = result.getAsJsonObject();
+
+					Gson gson = new Gson();
+					
+					int status = rv.get("status").getAsInt();
+					
+					if (status == 0) {
+						JsonArray content = rv.get("content").getAsJsonArray();
+						if (content != null) {
+							Type listType = new TypeToken<List<FeedCategory>>() {}.getType();
+							final List<FeedCategory> cats = gson.fromJson(content, listType);
+							
+							m_cats.clear();
+							
+							for (FeedCategory c : cats)
+								m_cats.add(c);
+							
+							sortCats();
+							
+							if (m_cats.size() == 0)
+								setLoadingStatus(R.string.error_no_feeds, false);
+							else
+								setLoadingStatus(R.string.blank, false);
+
+						}
+					} else {
+						MainActivity activity = (MainActivity)getActivity();							
+						activity.login();
+					}
+				} catch (Exception e) {
+					e.printStackTrace();
+					setLoadingStatus(R.string.error_invalid_object, false);
+					// report invalid object received
+				}
+			} else {
+				// report null object received, unless we've been awakened from sleep right in the right time
+				// so that current request failed
+				if (m_cats.size() == 0) setLoadingStatus(R.string.error_no_data, false);
+			}
+			
+			return;
+	    }
+	}
+
+	public void sortCats() {
+		Comparator<FeedCategory> cmp;
+		
+		if (m_prefs.getBoolean("sort_feeds_by_unread", false)) {
+			cmp = new CatUnreadComparator();
+		} else {
+			cmp = new CatTitleComparator();
+		}
+		
+		Collections.sort(m_cats, cmp);
+		m_adapter.notifyDataSetInvalidated();
+		
+	}
+	
+	private class FeedCategoryListAdapter extends ArrayAdapter<FeedCategory> {
+		private ArrayList<FeedCategory> items;
+
+		public static final int VIEW_NORMAL = 0;
+		public static final int VIEW_SELECTED = 1;
+		
+		public static final int VIEW_COUNT = VIEW_SELECTED+1;
+
+		public FeedCategoryListAdapter(Context context, int textViewResourceId, ArrayList<FeedCategory> items) {
+			super(context, textViewResourceId, items);
+			this.items = items;
+		}
+
+		public int getViewTypeCount() {
+			return VIEW_COUNT;
+		}
+
+		@Override
+		public int getItemViewType(int position) {
+			FeedCategory cat = items.get(position);
+			
+			if (cat.id == m_selectedCatId) {
+				return VIEW_SELECTED;
+			} else {
+				return VIEW_NORMAL;				
+			}			
+		}
+
+		@Override
+		public View getView(int position, View convertView, ViewGroup parent) {
+			View v = convertView;
+
+			FeedCategory cat = items.get(position);
+
+			if (v == null) {
+				int layoutId = R.layout.feeds_row;
+				
+				switch (getItemViewType(position)) {
+				case VIEW_SELECTED:
+					layoutId = R.layout.feeds_row_selected;
+					break;
+				}
+				
+				LayoutInflater vi = (LayoutInflater)getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+				v = vi.inflate(layoutId, null);
+
+			}
+
+			TextView tt = (TextView) v.findViewById(R.id.title);
+
+			if (tt != null) {
+				tt.setText(cat.title);
+			}
+
+			TextView tu = (TextView) v.findViewById(R.id.unread_counter);
+
+			if (tu != null) {
+				tu.setText(String.valueOf(cat.unread));
+				tu.setVisibility((cat.unread > 0) ? View.VISIBLE : View.INVISIBLE);
+			}
+			
+			ImageView icon = (ImageView)v.findViewById(R.id.icon);
+			
+			if (icon != null) {
+				icon.setImageResource(cat.unread > 0 ? R.drawable.ic_rss : R.drawable.ic_rss_bw);
+			}
+
+			return v;
+		}
+	}
+
+	@Override
+	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
+			String key) {
+		// TODO Auto-generated method stub
+		
+	}
+
+	@Override
+	public void onItemClick(AdapterView<?> av, View view, int position, long id) {
+		ListView list = (ListView)av;
+		
+		if (list != null) {
+			FeedCategory cat = (FeedCategory)list.getItemAtPosition(position);
+			m_catSelectedListener.onCatSelected(cat);
+			m_selectedCatId = cat.id;
+			m_adapter.notifyDataSetChanged();
+		}
+	}
+}
diff --git a/src/org/fox/ttrss/FeedsFragment.java b/src/org/fox/ttrss/FeedsFragment.java
index 06d48fbe..c3f1f01e 100644
--- a/src/org/fox/ttrss/FeedsFragment.java
+++ b/src/org/fox/ttrss/FeedsFragment.java
@@ -1,11 +1,9 @@
 package org.fox.ttrss;
 
 import java.io.BufferedInputStream;
-import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.InputStream;
-import java.io.InputStreamReader;
 import java.lang.reflect.Type;
 import java.net.MalformedURLException;
 import java.net.URL;
@@ -20,11 +18,9 @@ import org.apache.http.HttpResponse;
 import org.apache.http.auth.AuthScope;
 import org.apache.http.auth.UsernamePasswordCredentials;
 import org.apache.http.client.methods.HttpGet;
-import org.apache.http.client.methods.HttpPost;
 import org.apache.http.conn.scheme.PlainSocketFactory;
 import org.apache.http.conn.scheme.Scheme;
 import org.apache.http.conn.scheme.SchemeRegistry;
-import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
 import org.apache.http.params.BasicHttpParams;
@@ -56,11 +52,9 @@ import com.google.gson.Gson;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
-import com.google.gson.JsonParser;
 import com.google.gson.reflect.TypeToken;
 
 public class FeedsFragment extends Fragment implements OnItemClickListener, OnSharedPreferenceChangeListener {
-	@SuppressWarnings("unused")
 	private final String TAG = this.getClass().getSimpleName();
 	private SharedPreferences m_prefs;
 	private FeedListAdapter m_adapter;
@@ -166,6 +160,10 @@ public class FeedsFragment extends Fragment implements OnItemClickListener, OnSh
 		final String sessionId = ((MainActivity)getActivity()).getSessionId();
 		final boolean unreadOnly = ((MainActivity)getActivity()).getUnreadOnly();
 		
+		FeedCategory cat = ((MainActivity)getActivity()).getActiveCategory();
+		
+		final int catId = (cat != null) ? cat.id : -4;
+		
 		if (sessionId != null) {
 			
 			if (!background) {
@@ -181,7 +179,7 @@ public class FeedsFragment extends Fragment implements OnItemClickListener, OnSh
 				{
 					put("op", "getFeeds");
 					put("sid", sessionId);
-					put("cat_id", "-4");
+					put("cat_id", String.valueOf(catId));
 					if (unreadOnly) {
 						put("unread_only", String.valueOf(unreadOnly));
 					}
diff --git a/src/org/fox/ttrss/MainActivity.java b/src/org/fox/ttrss/MainActivity.java
index 763e1fa7..511873b1 100644
--- a/src/org/fox/ttrss/MainActivity.java
+++ b/src/org/fox/ttrss/MainActivity.java
@@ -27,7 +27,7 @@ import android.widget.TextView;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 
-public class MainActivity extends FragmentActivity implements FeedsFragment.OnFeedSelectedListener, ArticleOps {
+public class MainActivity extends FragmentActivity implements FeedsFragment.OnFeedSelectedListener, ArticleOps, FeedCategoriesFragment.OnCatSelectedListener {
 	private final String TAG = this.getClass().getSimpleName();
 
 	private SharedPreferences m_prefs;
@@ -35,6 +35,7 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 	private String m_sessionId;
 	private Article m_selectedArticle;
 	private Feed m_activeFeed;
+	private FeedCategory m_activeCategory;
 	private Timer m_refreshTimer;
 	private RefreshTask m_refreshTask;
 	private Menu m_menu;
@@ -43,6 +44,7 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 	private boolean m_unreadArticlesOnly = true;
 	private boolean m_canLoadMore = true;
 	private boolean m_compatMode = false;
+	private boolean m_enableCats = false;
 
 	public void updateHeadlines() {
 		HeadlinesFragment frag = (HeadlinesFragment)getSupportFragmentManager().findFragmentById(R.id.headlines_fragment);
@@ -106,7 +108,10 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 
 		@Override
 		public void run() {
-			refreshFeeds();
+			if (!m_enableCats || m_activeCategory != null)
+				refreshFeeds();
+			else
+				refreshCategories();
 		}
 	}
 	
@@ -120,10 +125,23 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 		}
 	}
 	
+	public synchronized void refreshCategories() {
+		FeedCategoriesFragment frag = (FeedCategoriesFragment) getSupportFragmentManager().findFragmentById(R.id.cats_fragment);
+
+		Log.d(TAG, "Refreshing categories...");
+
+		if (frag != null) {
+			frag.refresh(true);
+		}
+	}
 
 	public void setUnreadOnly(boolean unread) {
 		m_unreadOnly = unread;
-		refreshFeeds();
+		
+		if (!m_enableCats || m_activeCategory != null )
+			refreshFeeds();
+		else
+			refreshCategories();
 	}
 	
 	public boolean getUnreadOnly() {
@@ -175,8 +193,11 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 			m_selectedArticle = savedInstanceState.getParcelable("selectedArticle");
 			m_unreadArticlesOnly = savedInstanceState.getBoolean("unreadArticlesOnly");
 			m_canLoadMore = savedInstanceState.getBoolean("canLoadMore");
+			m_activeCategory = savedInstanceState.getParcelable("activeCategory");
 		}
 		
+		m_enableCats = m_prefs.getBoolean("enable_cats", false);
+		
 		Display display = getWindowManager().getDefaultDisplay();
 		int orientation = display.getOrientation();
 		int minWidth = orientation % 2 == 0 ? 1024 : 600;
@@ -205,13 +226,22 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 		if (m_smallScreenMode) {
 			if (m_selectedArticle != null) {
 				findViewById(R.id.feeds_fragment).setVisibility(View.GONE);
+				findViewById(R.id.cats_fragment).setVisibility(View.GONE);
 				findViewById(R.id.headlines_fragment).setVisibility(View.GONE);
 			} else if (m_activeFeed != null) {
 				findViewById(R.id.feeds_fragment).setVisibility(View.GONE);
 				findViewById(R.id.article_fragment).setVisibility(View.GONE);
+				findViewById(R.id.cats_fragment).setVisibility(View.GONE);
 			} else {
 				findViewById(R.id.headlines_fragment).setVisibility(View.GONE);
-				findViewById(R.id.article_fragment).setVisibility(View.GONE);
+				//findViewById(R.id.article_fragment).setVisibility(View.GONE);
+				
+				if (m_enableCats && m_activeCategory == null) {
+					findViewById(R.id.feeds_fragment).setVisibility(View.GONE);
+					findViewById(R.id.cats_fragment).setVisibility(View.VISIBLE);
+				} else {
+					findViewById(R.id.cats_fragment).setVisibility(View.GONE);
+				}
 			}
 		} else {
 			if (m_selectedArticle == null)
@@ -252,13 +282,17 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 		out.putParcelable("selectedArticle", m_selectedArticle);
 		out.putBoolean("unreadArticlesOnly", m_unreadArticlesOnly);
 		out.putBoolean("canLoadMore", m_canLoadMore);
+		out.putParcelable("activeCategory", m_activeCategory);
 	}
 
 	@Override
 	public void onResume() {
 		super.onResume();
 
-		if (!m_prefs.getString("theme", "THEME_DARK").equals(m_themeName)) {
+		boolean needRefresh = !m_prefs.getString("theme", "THEME_DARK").equals(m_themeName) ||
+			m_prefs.getBoolean("enable_cats", false) != m_enableCats;
+		
+		if (needRefresh) {
 			Intent refresh = new Intent(this, MainActivity.class);
 			startActivity(refresh);
 			finish();
@@ -334,6 +368,21 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
         			
         			m_activeFeed = null;
         			initMainMenu();
+        			refreshFeeds();
+
+        		} else if (m_activeCategory != null) {
+        			if (m_compatMode) {
+        				findViewById(R.id.main).setAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_right));
+        			}
+
+        			findViewById(R.id.feeds_fragment).setVisibility(View.GONE);
+            		findViewById(R.id.cats_fragment).setVisibility(View.VISIBLE);
+
+        			m_activeCategory = null;
+        			
+        			initMainMenu();
+        			refreshCategories();
+        			
         		} else {
         			finish();
         		}
@@ -450,6 +499,7 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 
 		initMainMenu();
 		refreshFeeds();
+
 	}
 
 	public void setCanLoadMore(boolean canLoadMore) {
@@ -554,10 +604,16 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 							
 							setLoadingStatus(R.string.loading_message, true);
 
-							FeedsFragment frag = new FeedsFragment();
-							
 							FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
-							ft.replace(R.id.feeds_fragment, frag);
+							
+							if (m_enableCats) {
+								FeedCategoriesFragment frag = new FeedCategoriesFragment();
+								ft.replace(R.id.cats_fragment, frag);
+							} else {
+								FeedsFragment frag = new FeedsFragment(); 
+								ft.replace(R.id.feeds_fragment, frag);
+							}
+
 							ft.commit();
 							
 							loginSuccess();
@@ -625,6 +681,23 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 		}
 	}
 
+	public void viewCategory(FeedCategory cat) {
+		m_activeCategory = cat;
+	
+		initMainMenu();
+		
+		if (m_smallScreenMode) {
+			findViewById(R.id.cats_fragment).setVisibility(View.GONE);
+			findViewById(R.id.feeds_fragment).setVisibility(View.VISIBLE);
+		}
+		
+		FeedsFragment frag = new FeedsFragment();
+	
+		FragmentTransaction ft = getSupportFragmentManager().beginTransaction();			
+		ft.replace(R.id.feeds_fragment, frag);
+		ft.commit();
+	}
+
 	public void openArticle(Article article, int compatAnimation) {
 		m_selectedArticle = article;
 		
@@ -668,6 +741,10 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 		return m_activeFeed;
 	}
 
+	public FeedCategory getActiveCategory() {
+		return m_activeCategory;
+	}
+	
 	public void logout() {
 		if (m_refreshTask != null) {
 			m_refreshTask.cancel();
@@ -749,4 +826,10 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
 		}		
 		return null;
 	}
+
+	@Override
+	public void onCatSelected(FeedCategory cat) {
+		m_activeCategory = cat;
+		viewCategory(cat);
+	}
 }
\ No newline at end of file