Check my code

[eluser]ibnclaudius[/eluser]
Hello, I'm new to PHP and CodeIgniter, so I decide to do a "login / register / password reset" system, as an exercise.

Below are the links to my code, everything is working perfectly, but I wonder if there's something that I can improve or should change. Thanks!

Controller: http://paste2.org/p/1838861

Model: http://paste2.org/p/1838862