Zend-Adding/Appending an element in a control in block

$form->submit->setDecorators(

 array(
             'ViewHelper',
              array(
                   array('data'=>'Html Tag' ),
                   array('placement'=>Zend_Form_Decorator_Abstract::PREPEND),
                    'tag'=>'span',
                    'class'=>'wp_submit'
                      ),
               array(
                    array(array('data'=>'Html Tag')),
                    array('tag'=>'span','class'=>'newspan')
                      )
        )

)

Cakephp:Image on clear Button

$this->Html->link($this->Html->image('button-clear.gif',array('alt'=>('clear',true),'border'=>'0'),array('onclick'=>"document.form.reset();return false;",'escape'=>'false)

CakePHP:Button Image does not appear

Button Image does not appears in fact html tags are converted to escape sequences

When ever an button image is inserted tags appear as in written instead of showing image