Will Codeigniter work for my needs?

[eluser]Clooner[/eluser]
[quote author="ChazUK" date="1270673258"]I was also looking to do something like what creatorbri has described.

I would describe it as having site containing different subsystems, like music.site.com, sport.site.com, entertainment.site.com. But then the controllers, models and views could be very different.
Sharing configs (unless overwritten in apps folder), errors, helpers, hooks and libraries so that I don't have to copy all of them across different apps within the same website.

However I look at it, I don't think CI can accommodate this.[/quote]

It is actually really easy to setup something like that... Simply detect the current url in the config and load it accordingly...