Вот это

$result = $db->sql_query("SELECT sid, catid, aid, title, time, hometext, bodytext, comments, counter, topic, informant, notes, acomm, score, ratings FROM ".$prefix."_stories $qdb $querylang ORDER BY sid DESC limit $offset, $storynum");
while ($row = $db->sql_fetchrow($result)) {
$s_sid = intval($row['sid']);
$catid = intval($row['catid']);
$aid = filter($row['aid'], nohtml);
$title = filter($row['title'], nohtml);
$time = $row['time'];
$hometext = filter($row['hometext']);
$bodytext = filter($row['bodytext']);
$comments = intval($row['comments']);
$counter = intval($row['counter']);
$topic = intval($row['topic']);
$informant = filter($row['informant'], nohtml);
$notes = filter($row['notes']);
$acomm = intval($row['acomm']);
$score = intval($row['score']);
$ratings = intval($row['ratings']);
if ($catid > 0) {
$row2 = $db->sql_fetchrow($db->sql_query("SELECT title FROM ".$prefix."_stories_cat WHERE catid='$catid'"));
$cattitle = stripslashes(check_html($row2['title'], "nohtml"));
}
getTopics($s_sid);
formatTimestamp($time);

Заменить на это

if ($pagenum == "") { $pagenum = 1; }
$offset = ($pagenum-1) * $storynum;
$offset = intval($offset);
$storynum = intval($storynum);
$sql = "SELECT sid, s.catid, s.aid, s.title, s.time, s.hometext, s.bodytext, s.comments, s.counter, s.topic, s.informant, s.notes, s.acomm, s.score, s.ratings, c.title, t.topicid, t.topicname, t.topicimage, t.topictext FROM ".$prefix."_stories AS s LEFT JOIN ".$prefix."_stories_cat AS c on (s.catid=c.catid) LEFT JOIN ".$prefix."_topics AS t on (s.topic=t.topicid) $qdb $querylang ORDER BY s.time DESC LIMIT $offset, $storynum";
$result = $db->sql_query($sql);
while (list($s_sid , $catid, $aid, $title, $time, $hometext, $bodytext, $comments, $counter, $topic, $informant, $notes, $acomm, $score, $ratings, $ctitle, $topicid, $topicname, $topicimage, $topictext) = $db->sql_fetchrow($result)) {
if ($catid > 0) {
$cattitle = $ctitle;
}
formatTimestamp($time);

Все вот все сложности не ленитесь!