// Register Sidebars function register_event_sidebar() { $args = array( 'id' => 'sidebar-4', 'name' => __( 'Event Sidebar', 'text_domain' ), 'description' => __( 'Appears on event pages, contains event and speaker inforamation', 'text_domain' ), 'before_title' => '<h1 class="widget-title">', 'after_title' => '</h1>', 'before_widget' => '<aside id="%1$s" class="widget %2$s">', 'after_widget' => '</aside>', ); register_sidebar( $args ); } add_action( 'widgets_init', 'register_event_sidebar' );