It would be nice to be implemented the following functionality for the tabbar:
Each tab should be able to contains sub tabs (drop down list) in case of such initialization. On the right side of the tab there should be a splitter with icon and when clicked the drop down menu will be displayed under the tab. When the user selects some of the sub tabs of the active tab its name and current id needs to be changed with the selected all.
Here is an exampe:
Hope you guys implement it.