title: Multi step/page form in PHP & CodeIgniter
body: <p>I'm trying to build a multi step/page form in PHP and CodeIgniter and I was wondering if any of you could help me.</p>
  
  <p>How can I have a multi step form in CI that updates rather than inserts again when you return to the previous step with the back button? How can I have a form that doesn't have those back button POST form resend messages?</p>
  
  <p>Edit: without JS if possible</p>
  
  <p>Thanks!</p>