How do I create a main tab and then assign existing tabs as the sub tab for that main tab?
for example:
I created a new tab which is MainTab1
I have existing tabs such as Gallery, GalleryComments, GalleryTags
I want to achieve:
MainTab1
[Gallery][GalleryComments][GalleryTags]
So basically, MainTab1 is the new tab I created. Then when I click MainTab1, the sub tabs Gallery, GalleryComments, GalleryTags will show up. How can I do this?