Help set up routes

Hello,

I have a URL like:

* http://site.ru/news/apple/videos/
* http://site.ru/news/apple/pictures/
* http://site.ru/news/apple/reviews/

And set up routes:
$route['([^.]+)/?'] = 'structure/view/$1';

According to this rule, I get only the first section: news.
How do I get the last instead of the first section, like:
* videos
* pictures
* reviews

Thank's