ci + smarty

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

/**
 * Smarty Class
 *
 * @package     CodeIgniter
 * @subpackage  Libraries
 * @category    Smarty
 * @author      Kepler Gelotte
 * @link        http://www.coolphptools.com/codeigniter-smarty
 */
require_once APPPATH . "libraries/SmartyBC.class.php";

class Template extends SmartyBC {

    private $words;
    private $_ci;
    private $views = '';
    public $EXT = '.tpl';

    function __construct()
    {
        parent::__construct();

        try
        {
            /**
             * get instance ci
             */
            $this->_ci =& get_instance();

            /**
             * load lang
             */
            
            //$this->_ci->lang->load('lang', true);

            /**
             * get string url
             */
            
            $controller = $this->_ci->uri->segment(1);
            $method = $this->_ci->uri->segment(2);
        

            /**
             * set template path
             */
               $this->template_dir = 'local/do/template';

            /**
             * smarty paramms
             */

            $this->compile_dir = APPPATH.'/compile';
            $this->cache_dir = APPPATH.'/cache';
            $this->config_dir = APPPATH.'/config';

            $this->assign('APPPATH', APPPATH );
            $this->assign('BASEPATH', BASEPATH );
            $this->assign('path', base_url());
            // erro firefox templates/2.0\/
            $this->assign('template_path', base_url().'/path/template');

            $this->assign('memory_usage', $this->_ci->benchmark->memory_usage());
            $this->assign('controller', strtolower($controller));
            $this->assign('method', strtolower($method));

            /**
            * Assign CodeIgniter object by reference to CI
            */
        
            if ( method_exists( $this, 'assignByRef') )
            {
                $ci =& get_instance();
                $this->assignByRef("ci", $ci);
            }

            /**
             * log debug
             */
            log_message('debug', "Smarty Class Initialized");

        } catch (SmartyException $e) 
        {
            show_error($e->getmessage());
        }
    }

    public function display()
    {
        $this->assign('content', $this->views);
        parent::display('template.tpl');
    }


    /**
     *  Parse a template using the Smarty engine
     *
     * This is a convenience method that combines assign() and
     * display() into one step. 
     *
     * Values to assign are passed in an associative array of
     * name => value pairs.
     *
     * If the output is to be returned as a string to the caller
     * instead of being output, pass true as the third parameter.
     *
     * @access  public
     * @param   string
     * @param   array
     * @param   bool
     * @return  string
     */
    function view($template, $data = array(), $return = FALSE)
    {
        try{       

            $template .= $this->EXT;

            foreach ($data as $key => $val)
            {
                $this->assign($key, $val);
            }
            
            $this->views .= $this->fetch($template)
           
       } catch (SmartyException $e) {
        show_error($e->getmessage());
       }
    }
}

/* End of file ci_smarty.php */
/* Location: ./application/libraries/ci_smarty.php */

Como usar:

$this->template->view('views/menu', array( 'dados' => $dados ) ); // menu.tpl
$this->template->view('views/menu_left', array( 'dados' => $dados ) ); // menu_left.tpl
$this->template->display();

Linha 49: Define a pasta do template, a pasta views devera estar dentro desta pasta.