WordPress Themes

Please add the following code to your child theme’s functions.php file. The below code will remove the “Uncategorized” category from widget and subcategories.

add_filter( 'woocommerce_product_categories_widget_args', 'thb_remove_uncategorized_category' );
add_filter( 'woocommerce_product_subcategories_args', 'thb_remove_uncategorized_category' );
function thb_remove_uncategorized_category( $args ) {
  $uncategorized = get_option( 'default_product_cat' );
  $args['exclude'] = $uncategorized;
  return $args;
}

You can also use the bottom code to remove Uncategorized from Product Listings:

add_filter( 'get_terms', 'thb_remove_uncategorized_from_listing', 20, 3 );
function thb_remove_uncategorized_from_listing( $terms, $post_id, $taxonomy ) {
	$uncategorized = get_option( 'default_product_cat' );

	foreach ( $terms as $key => $term ) {
		if ( intval( $uncategorized ) === $term->term_id ) {
			unset( $terms[ $key ] );
		}
	}

	return $terms;
}