I got into trouble.
Need engine that would satisfy the requirements:
1. Multicategory (the inclusion of articles in different categories). Or at least takhirovna with the hierarchy.
2. Easy to handle on the other pages, like in Wikipedia, for example. It's about the links in double square brackets, if you click on a link that goes to a nonexistent page, it is possible to create it.
3. Easy to add pages.
Now is mediawiki, which I do not like the structure of the pictures (they are by default created a lot of different). Poor support with the browser Google.chrome — sometimes loaded gz files instead of pages (I found a lot of issues in the Internet and not a normal response).
Dokuwiki no multicategories. If there is a plugin — poke my nose into it (I'm a couple of years ago was looking for was not).
UPD IN MediaWiki still do not like the principle of the updates (although svn update is easy)