Hide the page links in the pagination in Codeigniter

Config options are set as :

 $this->load->library('pagination');
    $config['base_url']    = "/blog/index/$tid/";
    $config['total_rows']  = $num_items;
    $config['per_page']    = $max_items;
    $config['first_link']  = FALSE;
    $config['last_link']   = FALSE;
    $config['uri_segment'] = 4;
    $config['use_page_numbers'] = TRUE;
    $config['display_pages'] = TRUE;
    $config['num_links']     = 1; # this doesn't work
    $config['prev_link']     = 'Previous';
    $config['next_link']     = 'Next';
    $config['cur_tag_open']  = '';
    $config['cur_tag_close'] = '';
    $config['full_tag_open'] = '

';
    $config['full_tag_close']= '
';

   $this->pagination->initialize($config);  
   $this->outputData['pagination']  = $this->pagination->create_links(); 

   


OUTPUT :  Prev 1 2 4 3 Next

And if I turn off display_pages I get:

OUTPUT :  Prev Next

Simply way to modify pagination like this in Codeigniter.