function xml_render(){
        $xml=simplexml_load_file(get_template_directory_uri()."/xml/airports.xml");
        $k = 0;
        $cities = array();
        foreach ($xml as $key => $value) {
            echo '<pre>';
          // var_dump($key);
             echo '</pre>';
               echo '<pre>';

                $city_ru = (array)$value->city_rus;
                $city_en = (array)$value->city_eng;


         //  var_dump($city_ru[0]);
             echo '</pre>';

           $cities[$k]['rus'] = $city_ru[0];
           $cities[$k]['eng'] = $city_en[0];

         //  if ($k == 100) break;

           $k++;
        }

               echo '<pre>';
         //  var_dump($cities);
             echo '</pre>';

$clean = array();

$clean = array_unique($cities, SORT_REGULAR);

$clean_num = array();

foreach ($clean as $key => $value) {
    array_push($clean_num, $clean[$key]);
}




    echo '<pre>';
//   var_dump($clean_num);
    echo '</pre>';

    $start = 0;
    $finish = 500;
    $next = 500;
    $previous = 0;


    if (isset($_GET['nextvisible']) && is_numeric(intval($_GET['nextvisible'])) ) {
       $next = intval($_GET['nextvisible']) + 500;
       $start = intval($_GET['nextvisible']);
       $finish = intval($_GET['nextvisible']) + 500;
    }


    for ($n=$start; $n < $finish; $n++) {
      echo '<div>---'.$n . ' - '. $clean_num[$n]['eng'] .'</div>';
    }



    echo '<a href="admin.php?page=cosmothemes__general&prevvisible='.$previous.'" class="prev-snippet"> << PREVIOUS 500 </a><a href="admin.php?page=cosmothemes__general&nextvisible='. $next .'" class="next-snippet">NEXT 500 >> </a>';

}