Looking for good CodeIgniter-code.

[eluser]Simian Studios[/eluser]
A good resource to check would be the [url="http://ellislab.com/codeigniter/user-guide/general/styleguide.html"]CodeIgniter Style Guide[/url].

While it may not help you write "good" code in the sense of it being the best code ever written (&trade, it will help you write clean and understandable code. Clean and understandable code is easier to refactor, so it will help you to write better code in the long run.