{% load widget_tweaks %}

<div class="form-group">
  <label for="{{ field.id_for_label }}" class="col-sm-2 control-label">{{ field.label }}</label>
  <div class="col-sm-10">
    {{ field|add_class:'form-control' }}
    <span class="help-block">{{ field.errors }}</span>
  </div>
</div>