Need some help.
 

I want to remove the table after my category, the one that says, posts, threads.moderator, etc. The blue table in the pic see below. How do I do it?

In your 'forumhome_forumbit_level1_nopost', delete that row, which should like something like:
<tr align="center">
<td bgcolor=""#C1D7F4" background="images/head_bg.gif""><smallfont>&nbsp;</smallfont></td>
<td bgcolor=""#C1D7F4" background="images/head_bg.gif"" width="80%" align="left"><smallfont color="#000000"><b>Forum</b></smallfont></td>
<td bgcolor=""#C1D7F4" background="images/head_bg.gif""><smallfont color="#000000"><b>Posts</b></smallfont></td>
<td bgcolor=""#C1D7F4" background="images/head_bg.gif""><smallfont color="#000000"><b>Threads</b></smallfont></td>
<td bgcolor=""#C1D7F4" background="images/head_bg.gif"" width="220" nowrap><smallfont color="#000000"><b>Last Post</b></smallfont></td>
</tr>

Yeah but not all the tables, only on one category.

Not possible then, because it uses the same code for all tables. Or maybe there is a way..

It is possible because I saw it done, I just dont know which file I edit, I need to edit a php file in the forum directory.

If it's file editing go to vB.org, since thats the support forum for file editing. But I don't think it needs file editing.

To do this in only one category would require a hack. Check vBulletin.org

Chen from Vb.org said you can do it via the index.php, he didnt say how cos hes busy.

Well ask someone in the Request Forum at vb.org.

index.php is a file and not a template, so you'll need vB.org.