如何使codeigniter加载HTML项目？

I have a project which is this one:

Its just a html webpage with the features of letting the user modify the product the way they want, it currently does not have any backend.

I have done this:

In my app/controllers I have a made one controller named:desing

it has this

<?php
  defined('BASEPATH') OR exit('No direct script access allowed');

  class desing extends CI_Controller {

public function index()
{
    $this->load->add_package_path(APPPATH.'third_party/desing_tool', FALSE);
    $this->load->view('index');
  }

}

I have the third party project in the folder third_party and my routing settings are this:

$route['desing'] = 'desing';

but it doesnt load, I want to add a shopping cart, I will make a cms but I cant make code igniter load this.

Any Ideas?