gistfile1.erb

<div class="control-group string required disabled">
    <label class="string required control-label" for="">
      <abbr title="required">*</abbr>
      Card Number
    </label>
    <div class="controls">
      <input class="string required disabled" value="<%= current_payment_method.masked_number %>" disabled="disabled" id="" name="" size="50" type="text">
    </div>
  </div>