How to separate forum categories

[scarrillo]

Currently all three of my categories are lumped together in the same table. I found the code to separate the welcome message from the forums, but now I want to separate my categories so they don't all run together. I am trying to achieve the look seen at:

http://www.sherdog.net/forums/

Also I am trying to achieve the way they have the category description and the collapse button above the forum/last post/threads/posts bar for each category. If anyone could lay this out for me that would be great.

Thanks.