[Solved] Active Records DB Model

When I search in my input put field with the model below. If there is the word that I type does not match the throws foreach error how do stop that?

A PHP Error was encountered

Severity: Notice
Message: Undefined variable: user_groups
Filename: user/users_group_list.tpl
Line Number: 85
A PHP Error was encountered
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: user/users_group_list.tpl
Line Number: 85

Throw errors only show up if type something that does not match what the best way so if I type something that does not match will not throw errors

PHP Code:

public function getUserGroups($limit = null, $offset = NULL) {
$this->db->select("user_group_id, name");
$this->db->from($this->db->dbprefix . 'user_group');
$this->db->limit($limit, $offset);
$this->db->order_by('name', 'asc');
$data = array(
'name' => $this->input->post('name'),
'user_group_id' => $this->input->post('user_group_id')
);
$this->db->like($data);
$this->db->or_like('name', 'match');
$this->db->or_like('user_group_id', 'match');
$query = $this->db->get();
return $query->result_array();
} 


There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!