是的，有，钩子是nav_menu_link_attributes:

apply_filters( \'nav_menu_link_attributes\', array $atts, WP_Post $item, stdClass $args, int $depth )

例如，这将添加nav-link 类到<a> 仅当主题位置($args->theme_location) 正是my-location:

add_filter( \'nav_menu_link_attributes\', \'my_nav_menu_link_attributes\', 10, 3 );
function my_nav_menu_link_attributes( $atts, $item, $args ) {
    if ( \'my-location\' === $args->theme_location ) {
        // Get existing classes, if any.
        $class = $atts[\'class\'] ?? \'\';

        // Now add your custom class(es).
        $atts[\'class\'] = "$class nav-link";
    }

    return $atts;
}