i have some fields in my table,and a phone field , i save filed like this in this filed 111-222-5555

now i want to all of my fields , and populate in my form , i want populate phone in 3 elements

when i try to this code

$id = $this->_request->getParam ( 'id' );
$values = $cutomModel->findCustomerById($id);// return array of row 
$frm->populate($values); 

all fields show in form except phone field ,

how can i populate phone field in 3 elements

thanks