Multi-Step Form Data

[eluser]mironcho[/eluser]
By default CI keeps session variables in session cookie (which can be encrypted). Cookie size is restricted to 4kb and if it's encrypted you can store less data (maybe_encrypted('ci_session_data' + 'your_data') < 4kb). So you must keep in mind that you can't store many data in session variables (if you are using default CI session).
For more info - user guide:

http://ellislab.com/codeigniter/user-gui...sions.html