title: Sub-modules in codeiginter HMVC?
body: <p>I am building a shopping cart system as part of a CodeIgniter 2 site that uses HMVC.</p>
  
  <p>Instead of having one big "cart" module I was hoping I could break up the module into sub modules.</p>
  
  <p>E.g.</p>
  
  <pre><code>/modules/cart
  /modules/cart/config
  /modules/cart/controllers
  /modules/cart/models
  /modules/cart/views
  /modules/cart/modules
  
  /modules/cart/modules/categories
  /modules/cart/modules/categories/config
  /modules/cart/modules/categories/controllers
  /modules/cart/modules/categories/models
  /modules/cart/modules/categories/views
  
  /modules/cart/modules/products
  /modules/cart/modules/products/config
  /modules/cart/modules/products/controllers
  /modules/cart/modules/products/models
  /modules/cart/modules/products/views
  </code></pre>
  
  <p>Is it possible to do this or something similar?</p>