WP_Links_List_Table::column_categories

	public function column_categories( $link ) {
		global $cat_id;

		$cat_names = array();
		foreach ( $link->link_category as $category ) {
			$cat = get_term( $category, 'link_category', OBJECT, 'display' );
			if ( is_wp_error( $cat ) ) {
				echo $cat->get_error_message();
			}
			$cat_name = $cat->name;
			if ( (int) $cat_id !== $category ) {
				$cat_name = "<a href='link-manager.php?cat_id=$category'>$cat_name</a>";
			}
			$cat_names[] = $cat_name;
		}
		echo implode( ', ', $cat_names );
	}