Выборка по категориям (DLE 10.2)

Существует хак Предыдущая - следующая новость [DLE 9.2 - 10.0], хорошо работает и на 10.2. Новости листает по всем категориям. Вопрос в следующем: как сделать выборку только по опледеленным категориям, а не по всем?

 Сам код

get_row($db->query("SELECT id,title,alt_name,date,category FROM " . PREFIX . "_post WHERE `id`='$nextid'")); $row_prev = $db->get_row($db->query("SELECT id,title,alt_name,date,category FROM " . PREFIX . "_post WHERE `id`='$previd'")); $row_max = $db->get_row($db->query("SELECT id FROM " . PREFIX . "_post ORDER BY id DESC")); if ($config['allow_alt_url'] == "yes") {     if ($config['seo_type'] == 1 OR $config['seo_type'] == 2) {         if ($row['category'] and $config['seo_type'] == 2) {             if ($nextid > $row_max['id']) {                 $next_link = '#';             }             else {                 $next_link = $config['http_home_url'] . get_url($row_next['category']) . "/" . $row_next['id'] . "-" . $row_next['alt_name'] . ".html";             }             if ($previd < 1) {                 $prev_link = '#';             }             else {                 $prev_link = $config['http_home_url'] . get_url($row_prev['category']) . "/" . $row_prev['id'] . "-" . $row_prev['alt_name'] . ".html";             }         }         else {             if ($nextid > $row_max['id']) {                 $next_link = '#';             }             else {                 $next_link = $config['http_home_url'] . $row_next['id'] . "-" . $row_next['alt_name'] . ".html";             }             if ($previd < 1) {                 $prev_link = '#';             }             else {                 $prev_link = $config['http_home_url'] . $row_prev['id'] . "-" . $row_prev['alt_name'] . ".html";             }         }     }     else {         if ($nextid > $row_max['id']) {             $next_link = '#';         }         else {             $next_link = $config['http_home_url'] . date('Y/m/d/', $row_next['date']) . $row_next['alt_name'] . ".html";         }         if ($previd < 1) {             $prev_link = '#';         }         else {             $prev_link = $config['http_home_url'] . date('Y/m/d/', $row_prev['date']) . $row_prev['alt_name'] . ".html";         }     } } else {     if ($nextid > $row_max['id']) {         $next_link = '#';     }     else {         $next_link = $config['http_home_url'] . "index.php?newsid=" . $row_next['id'];     }     if ($previd < 1) {         $prev_link = '#';     }     else {         $prev_link = $config['http_home_url'] . "index.php?newsid=" . $row_prev['id'];     } } if ($nextid > $row_max['id']) {     $tpl->set('{next.title}', 'Это последняя публикация!'); } else {     $tpl->set('{next.title}', $row_next['title']); } if ($previd < 1) {     $tpl->set('{prev.title}', 'Это первая публикация!'); } else {     $tpl->set('{prev.title}', $row_prev['title']); } $tpl->set('{next.link}', $next_link); $tpl->set('{prev.link}', $prev_link);

Источник: dle-faq.pro