Column Sizing

[kb6673]

Bootstrap 3 suggests we size input columns with column containers as they take 100% of their container

<div class="row">
  <div class="col-md-4">
    <input type="text" class="form-control">
  </div>
</div>

Would this be the best way to achieve something similar?

        echo $this->Form->input('custom_css', array(
            'div' => 'form-group row',
            'label' => 'Custom CSS',
            'before' => '<div class="col-md-4">',
            'after' => '</div>',
        ));