Action Bar Button Categories Android

<item android:id="@+id/categories"
android:icon="@drawable/categories"
android:showAsAction="always"
android:title="Overflow" >
<menu> 
<item android:id="@+id/eleven" 
android:icon="@drawable/news" 
android:title="Eleven" /> 
<item android:id="@+id/mizzima" 
android:icon="@drawable/news" 
android:title="Mizzima" /> 
</menu> 
</item>