confused about coding pattern

[eluser]WanWizard[/eluser]
Redirecting requests to a single controller isn't possible in CI, because it lacks the possibility for controllers to call other controllers. You would need a third-party solution like Modular Extensions for that.

You can use this: http://www.slideshare.net/mirahman/acl-in-codeigniter as a start to implement an ACL hook.

As you your last question, read the user guide on how to name your files and classes.