public function post_class( $classes ) {
			global $post;
			if ( is_object( $post ) && isset( $post->post_type ) && $post->post_type == self::POSTTYPE && $terms = get_the_terms( $post->ID, self::TAXONOMY ) ) {
				foreach ( $terms as $term ) {
					$classes[] = 'cat_' . sanitize_html_class( $term->slug, $term->term_taxonomy_id );
				}
			}

			return $classes;
		}