workorder/application/libraries/Ci_smarty.php

<?php
if (!defined('BASEPATH')) {
    exit('No direct script access allowed');
}
require_once APPPATH.'libraries/smarty/Smarty.class.php';
class Ci_smarty extends Smarty
{
    protected $ci;
    public function __construct()
    {
        parent::__construct();
        $this -> ci =& get_instance();
        $this -> ci -> load -> config('smarty');
        //加载smarty的配置文件
        $this -> cache_lifetime = $this -> ci -> config -> item('cache_lifetime');
        $this -> caching = $this -> ci -> config -> item('caching');
        $this -> config_dir = $this -> ci -> config -> item('config_dir');
        $this -> template_dir = $this -> ci -> config -> item('template_dir');
        $this -> compile_dir = $this -> ci -> config -> item('compile_dir');
        $this -> cache_dir = $this -> ci -> config -> item('cache_dir');
        $this -> use_sub_dirs = $this -> ci -> config -> item('use_sub_dirs');
        $this -> left_delimiter = $this -> ci -> config -> item('left_delimiter');
        $this -> right_delimiter = $this -> ci -> config -> item('right_delimiter');
    }
}