Dozvoli HTML u opisima kategorija i tagova

foreach ( array( 'pre_term_description' ) as $filter ) {
    remove_filter( $filter, 'wp_filter_kses' );
}
 
foreach ( array( 'term_description' ) as $filter ) {
    remove_filter( $filter, 'wp_kses_data' );
}

https://docs.woocommerce.com/document/allow-html-in-term-category-tag-descriptions/