ékezetes névelős dolog.

gistfile1.aw

function nevelo($kategoria)
{
  $maganhangzok = array(
      97, 192, 193, 194, 195, 196, 197, 224, 225, 226, 227, 228, 229, 69,
      101, 200, 201, 202, 203, 232, 233, 234, 235, 73, 105, 204, 205, 206,
      207, 79, 210, 211, 212, 213, 214, 242, 243, 244, 245, 246, 111, 85,
      117, 217, 218, 219, 220, 249, 250, 251, 252 );

  $nevelo = 'A';
  if (in_array(ord(substr($kategoria, 0, 1)), $maganhangzok))
  {
    $nevelo = 'Az';
  }

 return $nevelo;
}