Form and user data advice needed!!!

[eluser]TheFuzzy0ne[/eluser]
I think you can get the session ID with $this->session->userdata('session_id').

I'm not sure why you'd need it though. CodeIgniter generates a new one periodically, and using the session methods such as set_userdata, userdata(), set_flashdata and flash_data() you can set/get any information within the current session. The session ID should not be required by your app, unless you're extending the session library.