I don't completely understand what you're trying to do, but be aware of this syntax:
[[Category:My category | {{PAGENAME}}]]
This will help your articles (with namespaces) to sort on the article name on category pages.
DanB
-----Original Message----- If I have a page named "SB:STRING()" and want to assign it to the "SB Category:String Functions" category, everything is grouped under "S" due to the language name space.