[Mediawiki-l] Blank out category in name

[orschiro at googlemail.com]

Hello guys,

I'd like to blank out the "category" or in my case "Kategorie" inside
of the name that is displayed as sub-category.
See my example "Kategorie:Einführungskurs: Kapitel 1: Sich vorstellen"
at http://wiki.ziesche.de/w/index.php?title=Kategorie:Einf%C3%BChrungskurs&action=edit&redlink=1

It should work because it is completely blanked out at wikipedia, e.g.
here: http://de.wikipedia.org/wiki/Kategorie:Thema_nach_Staat

How can I achieve this?

robert