$sql = "SELECT b.nickname, a.table, a.tbn, a.no, a.contents, a.subject, a.user_name, a.user_id, a.hit, a.voted_count, a.reply_count, a.reg_date from ( ";
        $sql.= "(SELECT 'CI 묻고 답하기' as 'table', 'qna' as 'tbn', ".$field." FROM board_qna ".$where.") UNION ";
        $sql.= "(SELECT 'TIP게시판'      as 'table', 'tip' as 'tbn', ".$field." FROM board_tip ".$where.") UNION ";
        $sql.= "(SELECT '강좌게시판' as 'table', 'lecture' as 'tbn', ".$field." FROM board_lecture ".$where.") UNION ";
        $sql.= "(SELECT 'CI 코드'     as 'table', 'source' as 'tbn', ".$field." FROM board_source ".$where.") UNION ";
        $sql.= "(SELECT 'CI 뉴스'       as 'table', 'news' as 'tbn', ".$field." FROM board_news ".$where.") UNION ";
        $sql.= "(SELECT '공지사항'    as 'table', 'notice' as 'tbn', ".$field." FROM board_notice ".$where.") UNION ";
        $sql.= "(SELECT '자유게시판'    as 'table', 'free' as 'tbn', ".$field." FROM board_free ".$where.") ";

        if($this->session->userdata('auth_code') >= '7'){
         $sql.= " UNION (SELECT '개발자게시판'    as 'table', 'ci' as 'tbn', ".$field." FROM board_ci ".$where.") ";
     }
        $sql.= " ) as a, users b where a.user_id=b.userid ";
        $sql.= "order by reg_date desc ";

  $rs = $this->db->query($sql);