Shorten product category base

function pm_shorten_category_base($replacement, $term) {
    if($term->taxonomy == 'product_cat') {
        $replacement = preg_replace('/^([^\/]+)\/([^\/]+)\/(.*)/', '$1/$3', $replacement);
    }
    return $replacement;
}
add_filter('permalink_manager_filter_term_slug', 'pm_shorten_category_base', 9, 2); // Filter products permalinks
add_filter('permalink_manager_filter_default_term_slug', 'pm_shorten_category_base', 9, 2); // Filter product category permalinks