add_filter( 'woocommerce_product_tabs', 'woo_custom_description_tab', 98 ); function woo_custom_description_tab( $tabs ) { $tabs['description']['callback'] = 'woo_custom_description_tab_content'; // Custom description callback return $tabs; } function woo_custom_description_tab_content() { echo 'Custom Description
'; echo 'Here's a custom description
'; }