function set_object_terms($object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids)
{
if ('category' == $taxonomy && WPT_Production::post_type_name == get_post_type($object_id)) {
$production = new WPT_Production($object_id);
$events = $production->events();
$categories = wp_get_post_categories($object_id);
foreach ($events as $event) {
wp_set_post_categories($event->ID, $categories);
}
}
}
