Как исключить определённую категорию из favorites?

$sql_select = "SELECT p.id, p.autor, p.date, p.short_story, CHAR_LENGTH(p.full_story) as full_story, p.xfields, p.title, p.category, p.alt_name, p.comm_num, p.allow_comm, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes, e.view_edit, e.editdate, e.editor, e.reason FROM " . PREFIX . "_post p LEFT JOIN " . PREFIX . "_post_extras e ON (p.id=e.news_id) WHERE {$stop_list}id in $favorites " .$order_list . "LIMIT " . $cstart . "," . $config['news_number'];
$sql_count = "SELECT COUNT(*) as count FROM " . PREFIX . "_post where {$stop_list}id in {$favorites}";

$sql_select = "SELECT p.id, p.autor, p.date, p.short_story, CHAR_LENGTH(p.full_story) as full_story, p.xfields, p.title, p.category, p.alt_name, p.comm_num, p.allow_comm, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes, e.view_edit, e.editdate, e.editor, e.reason FROM " . PREFIX . "_post p LEFT JOIN " . PREFIX . "_post_extras e ON (p.id=e.news_id) WHERE {$stop_list}id in $favorites  AND category NOT regexp '[[:<:]](1|2|3)[[:>:]]' " .$order_list . "LIMIT " . $cstart . "," . $config['news_number'];
$sql_count = "SELECT COUNT(*) as count FROM " . PREFIX . "_post where {$stop_list}id in {$favorites}  AND category NOT regexp '[[:<:]](1|2|3)[[:>:]]'";