My 2 cents to the MediaWiki project
Hide Empty Sections is a MediaWiki extension which hides sections with blank content in a wiki page. The 'hiding' only affects the page view; the page source is not modified. This extension is useful if you would like the page sources in your wiki to have a definite structure, but would like the page views to be well formatted without empty sections. Download and Installation Instructions are provided in the MediaWiki Extension page.