URL segments with pure navigational purpose (no controller)

[eluser]omgnoseat[/eluser]
Hello,

I have been searching alot of the forums and found alot of similiar topics, but I found them very hard to understand.

My situation:
Lets say we have a website with the following URL segement:
www.example.com/something

With codeigniter, "something" is a controller.

Now what I want is just to use "something" purely for navigational options. So I could use it in this way.
www.example.com/something/controller

It's probably very simple but I found the other topics very difficult to understand.
Thanks in advance.