<?php

$xml = '<digiseller.request><category><id>99534</id></category><seller><id>748883</id></seller><pages><num></num><rows></rows></pages><products><order></order><currency></currency></products><lang>ru-RU</lang></digiseller.request>';
$url = 'http://shop.digiseller.ru/xml/shop_products.asp';
$curl = curl_init($url);
curl_setopt ($curl, CURLOPT_HTTPHEADER, array("Content-Type: text/xml"));
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $xml);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($curl);
curl_close($curl);
$array_data = json_decode(json_encode(simplexml_load_string($result)), true);
$item_counter = 0;
print_r ($array_data);
while ($array_data['products']['product'][$item_counter]['id'] != '') {

    print_r ($array_data['products']['product'][$item_counter]['name']);
    $item_counter = $item_counter + 1;
}
?>