breadcrumbs.php

		/**
		 * Generate single crumb html
		 *
		 * @since 3.6.0
		 */
		public static function get_crumb_html( $label, $link, $class = '', $rel = '' ) {
			$scope = self::get_scope();
			$class = $class ? ' class="'. esc_attr( $class ) .'"': '';
			$rel   = $rel ? ' rel="'. esc_attr( $rel ) .'"': '';
			return '<span '. $scope . $class . $rel .'><a href="'. esc_url( $link ) .'" title="'. esc_attr( $label ) .'" itemprop="url" content="'. esc_url( $link ) .'"><span itemprop="title">'. esc_html( $label ) .'</span></a></span>';
		}