Codeigniter subdomains

[eluser]Citizen[/eluser]
Thanks, guys, but I'm still not sure what to do.

If it helps: I have a finite list of subdirectories that I want to use, only about 5 or so. I'm not looking to create a wildcard subdomain catcher.

And I'm aware of how to create subdirectories through DNS or with htaccess, but I'm not sure what the best practice would be for codeigniter. I'm hoping someone can tell me what the best way to do this with codeigniter.