Copy this code and paste it in your HTML
'*' => array('StringTrim', 'StripTags') );
);
$input = new Zend_Filter_Input($filters, $validators, $data);
if ($input->isValid())
{
}
else
{
$messages = $input->getMessages();
$this -> view -> form = $input->getEscaped();
$this->view->invalid = $messages;
}