Change the posts url in the sitemap?

Hi!

We are working in a project where the front-end is made in AngularJS, so the front-end URL is different of the wordpress installation because they are separated one from another. We need to change the default URL site-map in order to customize it and make it according to the front-end.

In the class-sitemaps.php we added this hook in the sitemap_url function:

function sitemap_url( $url ) {
		if ( isset( $url['mod'] ) )
			$date = mysql2date( "Y-m-d\TH:i:s+00:00", $url['mod'] );
		else
			$date = date( 'c' );

		// This hook has been created for edit the sitemap url for each post.
		$url = apply_filters('wpseo_sitemap_url', $url);

		$url['loc'] = htmlspecialchars( $url['loc'] );

Also we found this actions but I think we don’t need it.

There is better way to do this? Without touching the plugin core files?

Thanks

http://wordpress.org/plugins/wordpress-seo/