I want to replace the navigation-menu by a fixed article (e.g. mywiki:menu). Therefor i just would like to replace the navigation part ("<?php foreach($this->data['navigation_urls'] ... " by a function, which inserts the article called "mywiki:menu". This would make the changing of the navigation-menue much more easier.
Take a look at the CVS history, It used to be like that between the 1.4 handling and the current system but I replaced it with the current format because the former was too slow, however if you don't need the speed you might want to backport it.