Creating a blogservice

[eluser]R. Oerlemans[/eluser]
Hello There,

My next project will be a blogservice, writed in CI. But i have a question where you hopefully have the answer on.

For example my siteadress is www.blogservice.com. Whene a user register with the username hellothisismyusername his/her adress is:

hellothisismyusername.blogservice.com.

When a visitor come to the url with a username before the . (dot) I want codeigniter select the controlers out of the folder:

/ controllers / blogs

Is there a possibility to easy fix this? In the query's after that is want to use:
->where('b_id' = $_bloginfo['blogid']);

$_bloginfo contains all the info (username, blogname, blogid) from that blog.

Is there an easy way to fix things like this?

Thank you very much.

Kind Regards,
R. Oerlemans