title: Codeigniter MVC structure user parameter detection
body: <p>I am wondering about CI best practices</p>
  
  <p>I need to have some code that detects the browser's language and assigns the appropriate language file.</p>
  
  <p>does such code belongs under library or helper? ( if i am right helpers are php functions as opposed to libraries which are classes ) </p>
  
  <p>also what would be the best way to launch a class as opposed to just load it.</p>
  
  <p>thank you.</p>