I know this can be done with jQuery, I just need to know how I could only show 1 Category for ever Tab, with the Category name on the Tab, like at the top there is a horizontal list of categories, and it only shows 1 category at a time, and you click another and it only shows that one.
Explain a little more, do you want something where's like a small icon, you click it and it collapses the forums and only showing the categories or what? I read the first post and didn't understand it much.
There is tabs up the top in a horizontal line. When you click on the tab wth the category name, it switches to that category, tabs are like the ones at http://www.theanimebar.co.cc/jquery/
I suggest it would be like when it displays forum on the index, only with an IF statement, with like if url = index.php?f=5 or something, then show forums.
It's actually not at easy as it sounds. You'll need to edit your forumbody.html page and manage to figure a way not to break the <ul>. That's assuming you want to have the tabbed menu to be completely integrated into the ACP > Forum Management.
If you don't mind typing out the tabs individually, then the process is extremely easy. *Explained on my phpDissection forum.