Thread:Project:Support desk/Maintain tree view state in sidebar

Hi, I have added tree view of categories to sidebar using CategoryTree extension and when i expand tree and navigate to any of page then the tree view is going to its collapsed state. How can i maintain trees state after clicking on it. It should work like Support/Development menu which maintains its state in mediawiki page: http://www.mediawiki.org/wiki/MediaWiki

plz help...