// Register Sidebars function custom_sidebar() { $args = array( 'id' => 'name', 'class' => 'class-name', 'name' => __( 'Name', 'text_domain' ), 'description' => __( 'Here is a description.', 'text_domain' ), 'before_title' => '<h4>', 'after_title' => '</h4>', ); register_sidebar( $args ); } add_action( 'widgets_init', 'custom_sidebar' );