/**
  * Render an element
  * @param object $element
  * @return string
  */
 protected function element($element)
 {
     // set id
     if (!isset($element->attributes['id'])) {
         $element->id = $this->id();
         $attributes = $element->attributes;
         $attributes['id'] = $element->id;
         $element->attributes = $attributes;
     } else {
         $element->id = $element->attributes['id'];
     }
     // set class
     if (!isset($element->attributes['class'])) {
         // set bootstap class
         $attributes['class'] = '';
     }
     // set label
     if (!$element->label) {
         if ($element->text) {
             $element->label = $this->_text->get($element->text);
         } else {
             $element->label = $this->_text->get('label.' . $element->key);
         }
     }
     // set error
     if ($error = $element->error()) {
         // create  errormessage
         $element->error = $this->_text->get('error.' . $element->key . '.' . $error);
     } else {
         $element->error = FALSE;
     }
     // set comment
     if (!isset($element->comment)) {
         if ($comment = $this->_text->get('comment.' . $element->key)) {
             $element->comment = $comment;
         } else {
             $element->comment = FALSE;
         }
     }
     // set default view
     $view = 'form/element';
     // render the element itself
     switch ($element->type) {
         case 'radio':
         case 'checkbox':
         case 'select':
             if (Arr::is_assoc($element->options) === FALSE) {
                 $options = array();
                 foreach ($element->options as $value => $label) {
                     $value = $label;
                     $label = $this->_text->get('option.' . $element->key . '.' . $value);
                     $options[$value] = $label;
                 }
                 $element->options = $options;
             }
             if ($element->type === 'radio') {
                 $view = 'form/radio';
             }
             if ($element->type === 'checkbox') {
                 $view = 'form/checkbox';
             }
             if ($element->type === 'select') {
                 if (isset($element->first_option)) {
                     $option = $element->first_option;
                     $value = is_array($option) && isset($option['value']) ? $option['value'] : $option;
                     $label = is_array($option) && isset($option['label']) ? $option['label'] : $this->_text->get('option.' . $element->key . '.' . $value);
                     // add to the beginning of options
                     $reverse = array_reverse($element->options, TRUE);
                     $reverse[$value] = $label;
                     $element->options = array_reverse($reverse, TRUE);
                 }
                 // set bootstap class
                 $attributes['class'] .= ' form-control';
                 $element->html = FormHTML::select($element->name, $element->options, $element->value, $attributes);
             }
             break;
         case 'hidden':
             $view = FALSE;
             $element->html = FormHTML::hidden($element->name, $element->value, $attributes);
             break;
         case 'submit':
             $view = FALSE;
             $label = isset($element->label) ? $element->label : $this->_text->get('label.' . $element->key);
             $element->html = FormHTML::submit($element->name, $label, $attributes);
             break;
         case 'btn':
             $view = FALSE;
             $label = isset($element->label) ? $element->label : $this->_text->get('label.' . $element->key);
             $href = isset($element->href) ? $element->href : '#';
             $element->html = HTML::anchor($href, $label, $attributes);
             break;
         case 'button':
             $view = FALSE;
             $label = isset($element->label) ? $element->label : $this->_text->get('label.' . $element->key);
             $element->html = FormHTML::button($element->name, $label, $attributes);
             break;
         case 'file':
             $element->html = FormHTML::file($element->name, $attributes);
             break;
         case 'image':
             $element->html = FormHTML::image($element->name, $element->value, $attributes, FALSE);
             break;
         case 'text':
         case 'password':
             if (!isset($attributes['placeholder'])) {
                 $attributes['placeholder'] = $this->_text->get('placeholder.' . $element->key);
             }
             // set bootstap class
             $attributes['class'] .= ' form-control';
             if ($element->type === 'text') {
                 $element->html = FormHTML::input($element->name, $element->value, $attributes);
             }
             if ($element->type === 'password') {
                 $element->html = FormHTML::password($element->name, $element->value, $attributes);
             }
             break;
         case 'textarea':
             $attributes['class'] .= ' form-control';
             $element->html = FormHTML::textarea($element->name, $element->value, $attributes, FALSE);
             break;
         default:
             $element->html = View::factory('form/' . $element->type, array('viewer' => $this, 'element' => $element))->render();
     }
     // wrap element
     if ($view) {
         $html = View::factory($view, array('element' => $element))->render();
     } else {
         $html = $element->html;
     }
     return $html;
 }
<div class="yf" data-use="backend.form.Upload">
	<?php 
for ($i = 0; $i < $element->amount; $i++) {
    ?>
		<?php 
    echo FormHTML::file($element->name, array('multiple' => 'multiple'));
    ?>
<br /><br />
	<?php 
}
?>
</div>