Submitting finished htmlbroom code

See: https://github.com/GigaOM/gigaom/issues/4979
if you instead hook with `10, 1` the filter will pass the post content as the first parameter to the function.

See: http://codex.wordpress.org/Plugin_API/Filter_Reference/content_save_pre

With that in place, you won't need these lines:
```
		$posts = get_posts();
		$id = $posts[0]->ID;
		$content = get_post_field( 'post_content', $id, 'attribute' );
```