title: codeigniter 3.0 custom 404 not found error page
body: <p>My problem is about custom error pages after upgrading to Codeigniter 3.0. </p>
  
  <p>I used to have a <code>Errors</code> controller which handled 404 error page of the website - on this controller I have customized some parts of page, such as if user is logged in, it was showing username on the navigation bar and etc. <em>(yes, on 404 error page)</em>. </p>
  
  <p>After upgrading to CI 3.0, I have noticed that error pages are handled in <a href="http://i.imgur.com/ddsOItc.png" rel="noreferrer">different folder</a>, I started to migrate to this way; but the problem is I can't load any variables to this page, such as <em>session variables</em> or can't even use any CI's functions on these pages. </p>
  
  <p>I think this pages are supposed to be only HTML pages, but is there any way to load variables to these error pages?</p>