title: Efficient Website Navigation with CodeIgniter
body: <p>I'm working on a site where there can be up to 3 levels of hierarchy in the navigation.</p>
  
  <ul>
  <li>main sections in the top header</li>
  <li>sub-navigation on the left</li>
  <li>optional sub-sub navigation below that</li>
  </ul>
  
  <p>In the past, when I've rolled my own with PHP, I would create a file navigation.php holding a class and arrays for all the sections and sub sections and a couple of functions to output the navigation. I'd set variables on every page in the site (current_section ='', current_sub_section='') so the navigation function would know what to highlight.</p>
  
  <p>In CodeIgniter, I'm wondering if this is still a good approach to use? </p>