You can rearrange the order of the Phone app tabs and/or delete the Favorites and Groups tabs.
From the Home screen, tap the Phone icon (in the QuickTap Bar).
Tap the Menu Key , then tap Edit tabs.
Drag a tab handle to move it to the position where you want it in the list.
Tap the Favorites or Groups checkbox a checkmark displays the tab; no checkmark deletes it from the Phone app tabs bar).
When you're finished making changes, tap Save.