Algo así:
Código PHP:
Ver original<?php
$doc = new DOMDocument();
$doc->loadHTMLFile('http://cinemex.com/cines/83');
$xpath = new DOMXPath($doc);
$peliculas = $xpath->query('//div[@class="block"]');
$imagenes = $xpath->query('//div[@class="img-cont"]');
for ($i = 0; $i < $peliculas->length; $i++) {
echo "<img src=\"{$imagenes->item($i)->getElementsByTagName('img')->item(0)->getAttribute('src')}\" /> <br />";
echo "{$peliculas->item($i)->nodeValue} <hr />";
}