Renamed group_names on register method to be group_ids

Resolves issue benedmunds#412

Author: benedmunds

libraries/Ion_auth.php

@@ -289,15 +289,15 @@ public function forgotten_password_check($code)
 	 * @return void
 	 * @author Mathew
 	 **/
-	public function register($username, $password, $email, $additional_data = array(), $group_name = array()) //need to test email activation
+	public function register($username, $password, $email, $additional_data = array(), $group_ids = array()) //need to test email activation
 	{
 		$this->ion_auth_model->trigger_events('pre_account_creation');
 
 		$email_activation = $this->config->item('email_activation', 'ion_auth');
 
 		if (!$email_activation)
 		{
-			$id = $this->ion_auth_model->register($username, $password, $email, $additional_data, $group_name);
+			$id = $this->ion_auth_model->register($username, $password, $email, $additional_data, $group_ids);
 			if ($id !== FALSE)
 			{
 				$this->set_message('account_creation_successful');
@@ -313,7 +313,7 @@ public function register($username, $password, $email, $additional_data = array(
 		}
 		else
 		{
-			$id = $this->ion_auth_model->register($username, $password, $email, $additional_data, $group_name);
+			$id = $this->ion_auth_model->register($username, $password, $email, $additional_data, $group_ids);
 
 			if (!$id)
 			{
@@ -499,4 +499,4 @@ public function in_group($check_group, $id=false)
 		return FALSE;
 	}
 
-}
+}