Право выбора группы пользователей - Joomla 3.x: Общие вопросы

public function getData()
{
//..........................
// Get the groups the user should be added to after registration.
			$this->data->groups = array();

			// Get the default new user group, Registered if not specified.
			$system	= $params->get('new_usertype', 2);

			$this->data->groups[] = $system;

$params->set('new_usertype', 8);