section-attachments.php

<?php
$args = array(
	'post_type' => 'attachment',
	'numberposts' => -1,
	'post_status' => 'any',
	'post_parent' => $post->ID
);
$attachments = get_posts($args);
if($attachments) : ?>
	<section class="multimedia single-section clearfix">
		<div class="twelve columns alpha omega">
			<h2><?php _e('Multimedia', 'latavelha'); ?></h2>
			<ul id="post-<?php the_ID(); ?>-attachments" class="loop attachments">
				<?php foreach($attachments as $attachment) :
					$src = wp_get_attachment_link($attachment->ID, 'medium');
					?>
					<li class="media">
						<?php echo $src; ?>
					</li>
				<?php endforeach; ?>
			</ul>
			<script type="text/javascript">
				jQuery(document).ready(function($) {
					var $container = $('#post-<?php the_ID(); ?>-attachments');
					$container.imagesLoaded(function() {
						$container.isotope({
							itemSelector: '.media',
							layoutMode: 'masonry'
						});
					});
				});
			</script>
		</div>
	</section>
<?php endif; ?>