Wikimedia Bugzilla is closed!

On wikibook the pages are organized following a tree structure, so the most of the pages have a name like xxxxx/yyyy/
zzzz and this entire name appears on the category page that contains it. It would be nice to have there only the last part 
of the pagename. I thought it should be simply done writing [[category:mathematic!integrals]] note: ! instead of | like in 
tables), and this should print on category page "Integrals" instead of "Matematic book/Advanced/Integrals".