title: Routing controllers in sub folders - Codeigniter 3
body: <p>I have admin folder in my controllers Folder.
  Structure as Below.</p>
  
  <ul>
  <li><p>Controllers<br>
  ----admin</p>
  
  <p>-----------Admin.php</p>
  
  <p>-----------Dashboard.php</p></li>
  </ul>
  
  <p>How to set a default controller?</p>
  
  <p>I am getting 404 Page Not Found</p>
  
  <pre><code>http://localhost:8080/project/admin/
  $routes['admin'] = 'admin/index';
  </code></pre>