How can this be done?

[juan71287]

Hey guys, I was recently at a vb site and I noticed that to access their forums its something like this:

http://www.url.com/forums/fanclubs/

And a post looks like this:

http://www.url.com/forums/fanclubs/75643-join-slinky-fan-club.html

http://www.url.com/forums/strategies-guides/87374-possible-make-private-server.html

I am guessing the number is the ID or something. I am trying to figure out how its getting done but I have absolutely no idea. Was wondering if anyone knew how to do this? Thanks.