Adding nofollow dynamically to wordpress blogroll links

This code snippet can be added either as part of a wordpress plugin or part of a wordpress theme to set all the blogroll links to have the nofollow attribute (useful if you have a lot of websites linking back to other sites in your collection).

// add nofollow to all blog links

add_filter( 'get_bookmarks', 'mb_links_get_bookmarks', 10, 2 );


function mb_links_get_bookmarks($links, $args)
{

	if (is_array($links)) {
		foreach (array_keys($links) as $i) {
				$links[$i]->link_rel .= ' nofollow';
				$links[$i]->link_rel = trim($links[$i]->link_rel);
		}
	}

	return $links;
}