Best structure for my "Online Shop"

Code:

<?php



namespace App\Controllers;



use CodeIgniter\Controller;





class Pages extends Controller{



    public function index()

    {



        $this->renderOther("home");



    }



    public function renderProducts($id){



        helper("server");

        helper("currency");





        if(!ServerEntryExists($id)){



            throw new \CodeIgniter\Exceptions\PageNotFoundException();



        }else{









            $this->server_model = new \Server_model();

            $data["theme"] = "sms_default/bootstrap.css";

            $data["servers"] = $this->server_model->get_servers();



            $this->product_model = new \Product_model();

            $data['products'] = $this->product_model->get_products_for_server($id);



            $data["serverstring"] = convertServerIDToString($id);



            echo view('templates/header', $data);

            echo view('pages/products', $data);

            echo view('templates/footer', $data);



        }



    }





    public function renderOther($page = "home")

    {





        helper("server");

        helper("currency");



            # Render everything else

        if(!is_file(APPPATH."/Views/pages/".$page.".php")){

            throw new \CodeIgniter\Exceptions\PageNotFoundException($page);

        }





        $this->server_model = new \Server_model();



        $data['title'] = ucfirst($page); // Capitalize the first letter

        $data["theme"] = "sms_default/bootstrap.css";

        $data["servers"] = $this->server_model->get_servers();





        if($page == "home"){

            $this->product_model = new \Product_model();

            $data['products'] = $this->product_model->get_products();

            //$data['products_entry'] = $this->product_model->get_products($id);

        }









        echo view('templates/header', $data);

        echo view('pages/'.$page, $data);

        echo view('templates/footer', $data);





    }





}

PHP Code:

/**
 * --------------------------------------------------------------------
 * Route Definitions
 * --------------------------------------------------------------------
 */

// We get a performance increase by specifying the default
// route since we don't have to scan directories.

$routes->get('products/(:segment)', 'Pages::renderProducts/$1');
$routes->match(['get', 'post'], 'admin/createProduct', 'Products::create');
$routes->get('/', 'Pages::index');
$routes->get('(:any)', 'Pages::renderOther/$1');

/**
 * ---------------------------------------------------------