{
	[
		{
			"@context": "http://schema.org",
			"@type": "BreadcrumbList",
			"itemListElement": 
			[
<?php
$categories = get_the_category();
foreach ( $categories as $category ):
  $breadcrumb = get_category_parents( $category->term_id, TRUE, ',' );
	$category_array = explode( ',', $breadcrumb );
	$position = 1;
	foreach ( $category_array as $category ):
		preg_match( '@http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?@', $category, $matches );
		$url = $matches[0];
		$name = strip_tags( $category );
?>
				{
					"@type": "ListItem",
					"position": <?php echo $position; ?>,
					"item" :
					{
						"@id": "<?php echo $url; ?>",
						"name": "<?php echo $name; ?>"
					}
<?php if ( $category !== end($category_array) ): ?>
				},
<?php else: ?>
				}
<?php endif; ?>
<?php $position = $position + 1; ?>
<?php
		endforeach;
	endforeach;
?>
			]
		}
	]
}