Project.php

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

class Project extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        require_once APPPATH . 'presenters/project_presenter.php';
        $this->data['project_ptr'] = new project_presenter();
        $this->load->model('project_model', 'project');
    }

    public function index( $product_id = null )
    {
        $this->data['product'] = $this->product->get( $product_id );
        $this->load->view('project', $this->data);
    }

}

/* End of file project.php */
/* Location: ./application/controllers/project.php */

project.php

// View

<?= $product_ptr->name( $product->name ) ?>

Project_presenter.php

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

class Project_presenter {

    public function name( $name )
    {
        if ( !empty($name) )
        {
            return $name;
        }
        else 
        {
            return 'The project has no name!';
        }
    }

}

/* End of file project_presenter.php */
/* Location: ./application/presenters/project_presenter.php */