How to Hide Sub Forums within Subforums?

[Mike21]

Basically I have a very simple question. I am using Vbulletin 4.2.4 and am trying to find a way to hide sub forums within sub forums, I know its possible but how do I do it?

This is how it should look when you go into a sub forum within a subforum:









But instead it looks like this when I try to do that:











Any idea how to do this?