FedorYemel

<?
$text = file_get_contents("http://site.com/index.php");
$data = array();

preg_match("/<div class=\"popupmenu-item\">(.*)<\/div>/Uis", $text, $out);

print "$out[1]";
?>

div#big_div{
padding: 10px 20px 30px 40px;
border: 1px solid #f00;
margin: 200px;
}
div#small_div{
width: 40px;
height: 60px;
border: 1px solid #00f;
}

<div id="big_div">
<div id="small_div">
</div>
</div>