아래부분을
$sql2 = " select wr_id,
wr_parent_id,
mb_id,
wr_name,
wr_email,
wr_homepage,
wr_num,
wr_subject,
wr_content,
wr_reply,
wr_comment,
wr_commentcnt,
wr_datetime,
wr_file1,
wr_file2,
wr_link1, 
wr_link1_hit   
from $tbl
where wr_id
$sql_order";
$result2 = sql_query($sql2);



아래와 같이 바꾸어 보세요..
$sql2 = " select wr_id,
wr_parent_id,
mb_id,
wr_name,
wr_email,
wr_homepage,
wr_num,
wr_subject,
wr_content,
wr_reply,
wr_comment,
wr_commentcnt,
wr_datetime,
wr_file1,
wr_file2,
wr_link1, 
wr_link1_hit   
from $tbl
where wr_comment = '0' #코멘트가 아닌것을 찾는다.
              and wr_notice = '-1' #공지사항인것을 찾는다.
  order by wr_id desc ";
$result2 = sql_query($sql2);