URL带有其他参数时，如何使用PHP的CI框架分页类？

$config['base_url'] =  base_url()."index.php/admin/article/manage?";　　if(!empty($_GET['block'])){	$this->db->where('class_id', $_GET['block']);	$config['base_url'].="&block=".$_GET['block'];   }   if(!empty($_GET['create_id'])){	$this->db->where('create_id', $_GET['create_id']);	$config['base_url'].="&create_id=".$_GET['create_id'];   }   if(!empty($_GET['has_pass'])){	$this->db->where('has_pass', $_GET['has_pass']);	$config['base_url'].="&has_pass=".$_GET['has_pass'];   }   if(!empty($_GET['pass_id'])){   　　$this->db->where('pass_id', $_GET['pass_id']);   　　$config['base_url'].="&pass_id=".$_GET['pass_id'];   }

$config['page_query_string'] = TRUE;

http://localhost/lycms/index.php/admin/article/manage?&block=8&create_id=0&has_pass=1&pagenow=2

// And here we go...		$output = '共'.$this->total_rows.'条记录  '.$this->cur_page .'/'.$num_pages.'页 ';