<?php
  $apelantResult = array(array('nrtel' => 1),array('nrtel' => 2));
  while($apelantRow = current($apelantResult))
{
    $apel=(string)$apelantRow['nrtel'];
    echo "<option value='".$apel."'>$apel</option>";
  next($apelantResult);
}

<option value='1'>1</option><option value='2'>2</option>