title: problems with module locations in codeigniter 3 hmvc
body: <p>I have a project which got several subfolders under Module folder, such as:</p>
  
  <ol>
  <li>modules
  
  <ul>
  <li>List Management
  
  <ul>
  <li>app
  
  <ul>
  <li>model</li>
  <li>view</li>
  <li>controller</li>
  <li>config       </li>
  </ul></li>
  </ul></li>
  </ul></li>
  </ol>
  
  <p>In cofig file, I set up module location like this,</p>
  
  <pre><code>$config['modules_locations'] = array(
      APPPATH.'modules/'                   =&gt; '../modules/',
  );
  </code></pre>
  
  <p>I set up my route like this</p>
  
  <pre><code>$route['app'] = 'app';
  </code></pre>
  
  <p>This route is not working, which shows CodeIgniter <strong>404 error page not found</strong>.</p>