rewrite

if (preg_match('/\/(\d+)-(.*).html/i', $uri, $match)) {
    try {
        $code = (int)$match[1];

        if ($code < 1) throw new Exception("Bad ID");

        $setup = parse_ini_file('../is/app/etc/setup.ini');
        $rdb = new PDO('mysql:host=' . $setup['db.host'] . ';dbname=' . $setup['db.dbname'] . ';charset=utf8', $setup['db.username'], $setup['db.password']);

        $sth = $rdb->prepare('SELECT url FROM items i INNER JOIN routes r ON (i.item_id = r.id) WHERE i.item_id = ? AND r.tag = ? AND r.ver = 1 LIMIT 1');
        $sth->execute([$code, 'routeItem']);
        $row = $sth->fetch(PDO::FETCH_ASSOC);

        if ($row['url'] != '') {
            header("Location: " . $row['url'], true, 301);
            exit;
        }
    } catch (Exception $e) {

    }
    header("Location: /");
    exit;
}

if (preg_match('/\/(\d+)-(.*)/i', $uri, $match)) {
    try {
        $code = (int)$match[1];

        if ($code < 1) throw new Exception("Bad ID");

        $setup = parse_ini_file('../is/app/etc/setup.ini');
        $rdb = new PDO('mysql:host=' . $setup['db.host'] . ';dbname=' . $setup['db.dbname'] . ';charset=utf8', $setup['db.username'], $setup['db.password']);

        $sth = $rdb->prepare('SELECT url FROM kategorie k LEFT JOIN routes r ON (k.nowa = r.id) WHERE k.stara = ? AND r.tag = ? AND r.ver = 1 LIMIT 1');
        $sth->execute([$code, 'routeCat']);
        $row = $sth->fetch(PDO::FETCH_ASSOC);

        if ($row['url'] != '') {
            header("Location: " . $row['url'], true, 301);
            exit;
        }
    } catch (Exception $e) {

    }
    header("Location: /");
    exit;
}