Not to show sub-forums in sub-categories

[Lauren]

It goes like this

Main Forum
-- Main Discussion
-- Main 2 Discussion
---- Sub-Category
------ Sub-Forum
------ Sub-Forum
-- Main 3 Discussion

If I clicked Main 2 Discussion it would show the sub-category and under that it would show the forums.

So it's like this

Start Table
Sub-Category
Sub-Forum 1
Sub-Forum 2
End Table

Posting Area

I want it to be like
Start Table
Sub-Category
End Table

Posting Area

so it only shows the category and you have to click that to view the sub-forums.

or not to show sub-forums in sub-forums