Zend Framework set selected Zend Form select

To set the selected value of a select element in a Zend Form object you need to use it's setValue method:

$user = $form->createElement('select','user')->setLabel('User: ')->setRequired(true);
        foreach($users as $u)
                $user->addMultiOption($u->id,$u->firstname.' '.$u->lastname);
 
$user->setValue($selected);