Thread:Project:Support desk/Subcategory search in category

I'm trying to make search for composer in International Music Score Library Project (IMSLP.org).

IMSLP's wiki have a category Composers (http://imslp.org/index.php?title=Category:Composers) with about 4665 sub-categories. One sub-category - one composer.

Is it possible to make search for a sub-category in category (case-insencetive!)

I'd read about mediawiki's api and make list-request: http://imslp.org/api.php?action=query&list=categorymembers&cmtitle=Category:Composers&cmlimit=100 It is exactly what i want, but how to implement server-side search on this result (or make other conditions in request).