Почему могут не переводиться слова? PHP

Question

Выводится: Башенный-кран-QTZ-125. Нужно: bashennyiy-kran-QTZ-125. Если создавать переменную с текстом, то все работает, а вот при получении данных нет.

$product = $dbh->query("SELECT product_id FROM one")->fetchAll(2);
$names = $dbh->query("SELECT product_id, name FROM two")->fetchAll(2);
foreach($product as $item){
  $id = $item['product_id'];
  foreach($names as $nam) {
    if ($nam['product_id']  == $id) {
      $semantik = get_semantic_url($nam['name']);
      echo $semantik . "<br>";
    }
  }
}
function get_semantic_url($str1) {
    $tr = array(
        "А"=>"a","Б"=>"b","В"=>"v","Г"=>"g",
        "Д"=>"d","Е"=>"e","Ж"=>"j","З"=>"z","И"=>"i",
        "Й"=>"y","К"=>"k","Л"=>"l","М"=>"m","Н"=>"n",
        "О"=>"o","П"=>"p","Р"=>"r","С"=>"s","Т"=>"t",
        "У"=>"u","Ф"=>"f","Х"=>"h","Ц"=>"ts","Ч"=>"ch",
        "Ш"=>"sh","Щ"=>"sch","Ъ"=>"","Ы"=>"yi","Ь"=>"",
        "Э"=>"e","Ю"=>"yu","Я"=>"ya","а"=>"a","б"=>"b",
        "в"=>"v","г"=>"g","д"=>"d","е"=>"e","ж"=>"j",
        "з"=>"z","и"=>"i","й"=>"y","к"=>"k","л"=>"l",
        "м"=>"m","н"=>"n","о"=>"o","п"=>"p","р"=>"r",
        "с"=>"s","т"=>"t","у"=>"u","ф"=>"f","х"=>"h",
        "ц"=>"ts","ч"=>"ch","ш"=>"sh","щ"=>"sch","ъ"=>"y",
        "ы"=>"yi","ь"=>"","э"=>"e","ю"=>"yu","я"=>"ya"," - "=>"-"," – "=>"-","--"=>"-","---"=>"-","----"=>"-",
   "."=>""," "=>"-","?"=>"","/"=>"-","\"=>"-","!"=>"",
   ""=>"-",":"=>"-",""=>"-","&quot;"=>"-","<"=>"-",
   ">"=>"-","|"=>"-","»"=>"-","«"=>"-","#"=>"","$"=>"","("=>"",")"=>""
    );
    return strtr($str1 , $tr);
}