Категория в поиске дополнительных полей

[sadan 6]

Можно ли исключить определенную категорию в поиске дополнительных полей?

// ################ Поиск новостей по доп. полям #################  

   if ($cstart) {

    $cstart = $cstart - 1;

    $cstart = $cstart * $config['news_number'];

   }

   $xf = urldecode ( $_GET['xf'] );

   if ( $config['charset'] == "windows-1251" AND $config['charset'] != detect_encoding($xf) ) {

    $xf = iconv( "UTF-8", "windows-1251//IGNORE", $xf );

   }

   $xf = @$db->safesql ( htmlspecialchars ( strip_tags ( stripslashes ( trim ( $xf ) ) ), ENT_QUOTES, $config['charset'] ) );

   $url_page = $config['http_home_url'] . "xfsearch/" . urlencode ( str_replace("'", "'", $xf) );

   $user_query = "do=xfsearch&xf=" . urlencode ( str_replace("'", "'", $xf) );


   if (isset ( $_SESSION['dle_sort_xfsearch'] )) $news_sort_by = $_SESSION['dle_sort_xfsearch'];

   if (isset ( $_SESSION['dle_direction_xfsearch'] )) $news_direction_by = $_SESSION['dle_direction_xfsearch'];


   $sql_select = "SELECT SQL_CALC_FOUND_ROWS p.id, p.autor, p.date, p.short_story, CHAR_LENGTH(p.full_story) as full_story, p.xfields, p.title, p.category, p.alt_name, p.comm_num, p.allow_comm, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes, e.view_edit, e.editdate, e.editor, e.reason FROM " . PREFIX . "_post p LEFT JOIN " . PREFIX . "_post_extras e ON (p.id=e.news_id) WHERE {$stop_list}xfields LIKE '%{$xf}%' AND approve=1" . $where_date . " ORDER BY " . $news_sort_by . " " . $news_direction_by . " LIMIT " . $cstart . "," . $config['news_number'];

   $sql_count = "SELECT FOUND_ROWS() as count";

   $allow_active_news = true;