How i add icon to button submit on zend framework

[manjava]

Hi,

i have this button

$submit = new Zend_Form_Element_Submit('submit');
        $submit	->setLabel(Zend_Registry::get('Zend_Translate')->translate('Send'))
         		->setIgnore(true)
        		->setOptions(array('class' => 'icon-arrow-right'));

and i want to add this code

<span class="add-on" id="login"><i class="icon-arrow-right"></i></span>

to see button same of the icon in the css

Thanks to tell me how can i add this ,i do setAttrib but not work for me it's show buuton and near icone but i want just icone such as button

Thanks in advance