title: How do i redirect my all old url to new url Codeigniter
body: <p>I want to redirect my all old url to new url.</p>
  
  <p>My few old URLs are </p>
  
  <p>domain.com/<br/>
  domain.com/submit<br/>
  domain.com/get/soft-name<br/>
  domain.com/most-downloaded<br/></p>
  
  <p>etc, etc,</p>
  
  <p>Now i want to redirect my all url to </p>
  
  <p>domain.com/en<br/>
  domain.com/en/submit<br/>
  domain.com/en/get/soft-name<br/>
  domain.com/en/most-downloaded<br/></p>
  
  <p>I am using CodeIgniter. Please Suggest me some code for route.php</p>
  
  <p>thanks in advance</p>