title: How to set the prefix for all Controller in CI
body: <p><br>
  I want to set the prefix in <strong>codeiginiter</strong> e.g. my url like this <code>http:/example.com/233/controller_name/method</code>. i found <a href="https://stackoverflow.com/questions/9351034/add-a-prefix-controller-to-url-in-codeigniter">this</a> , but in this topic we need to declare separately endpoint for each url.<br></p>
  
  <pre><code>$route['547/users/auth'] = 'users/auth';
  $route['4569/users/create'] = 'users/create';
  </code></pre>
  
  <p><br> I want to a default <code>route</code>  which is ignore the <code>1 segment</code> of url. because first segment of url change every time. it is auto-increment id of MySQL table. </p>