controller

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

class Welcome extends CI_Controller {

public function index()
    {
           $this->load->view('welcome_message',$data);
    }

public function trend()
    {
        //for calling paginantion in function trendview
        $this->trendview();
    }

public function trendview($offset=0)
      {
         $jml=  $this->db->get_where('articles',array('art_jenis'=>'TREND'));
         $config['base_url'] = $this->config->item('base_url').'trend';  //tren is caming from router
          //$config['base_url'] = base_url().'welcome/trendview'; <--when i change this it working by default url
     }
}


//Router
/*router for front end artikel*/
$route['trend'] = 'welcome/trend';