17. Now update the functions.php with the following codes:
function add_menu_link_class( $atts, $item, $args ) {
if($args->link_class) {
$atts['class'] = $args->link_class;
}
return $atts;
}
add_filter( 'nav_menu_link_attributes', 'add_menu_link_class', 1, 3 );
function add_menu_list_item_class($classes, $item, $args) {
if($args->list_item_class) {
$classes[] = $args->list_item_class;
}
return $classes;
}
add_filter('nav_menu_css_class', 'add_menu_list_item_class', 1, 3);