Several segments in the URL

[eluser]tobbesanda[/eluser]
Just think that I have a normal blog with the url:

http://mysite.com/category[1]/category-1[2]/category-1[3]/my-blog-post[4]

category[1] = the controller
category[2] = a parent categories from the db
category[3] = a child category (if exists) from the db
my-blog-post[4] = The blog post that is stored in the db and belong to category[2] & category[3] (if there is one)