title: Remove Label from django crispy form layout
body: <p>I am using djano Crispy form and twitter bootstrap, i have a form.</p>
  
  <pre><code>def __init__(self, *args, **kwargs):
      self.helper = FormHelper()
      self.helper.form_method = 'POST'
      self.helper.form_class = 'form-horizontal'
      self.helper.layout = Layout( 
          Div(
              Div(HTML("""&lt;label&gt; Trust Admin Name&lt;/label&gt;"""), css_class='span3'),
              Div('first_name', css_class='span3'),
              Div('middle_name', css_class='span3'),
              Div('last_name', css_class='span3'),
              ),
          )
  </code></pre>
  
  <p>How to remove the label first_name, middle_name and last_name from layout.</p>