Duplicating Subforums?
 

I'm building a forum, with a structure as follows:

Forum 1
-A
-B
-C

Forum 2
-A
-B
-C

etc.

The board will end up having over 1200 subforums, all with the same names, so I need a way to duplicate each forum, rename the main one, and have all the subforums automatically add themselves to the new forum.

Is there a tool to do this, or any simple way? I'd much rather not have to do it by hand or use a macro.