Discussion of ideas. I'm building a site.

[eluser]Unknown[/eluser]
I'm going to try and re-build my website (www.decuadros.org) using CodeIgniter.

I'm new to this, so I'm going to ask for some suggestions.

This is what I'm thinking: I'm going to build a controller for each type of media I will present on my website (blog, video, music, photography, etc...). Then I will build an administrator controller, and a user contoller. The administrator controller would be used to create, update, and delete rows in my databases for each type of media I will present. Then I will create a controller for blog posting users, so they can post, edit, update, and delete their blog entries.

Does this seem like the best way to go about this? What should I use for a login system based on roles? Is there anything else I should know about?

Thanks,
Cole