자문 자답이 되었네요.

28번 : $sql = " select ca_id, ca_name from $g4[yc4_category_table]
where ca_id like '$tmp_ca_id%'
and ca_use = '1'
and length(ca_id) = $len2 order by ca_id ";

위를...
$sql = " select ca_id, ca_name from $g4[yc4_category_table]
where ca_id like '$ca_id%'
and ca_use = '1'
and length(ca_id) = $len2 order by ca_id ";

이렇게 바꾸니 잘 되네요.