check_box_helper.rb

class TwitterBootstrapFormFor::FormControls < ActionView::Helpers::FormBuilder
  # Truncated! Full file is at https://github.com/jlogsdon/twitter_bootstrap_form_for/blob/master/lib/twitter_bootstrap_form_for/form_builder.rb

  def check_box(attribute, text, options = {}, checked_value = 1, unchecked_value = 0)
    klasses = _merge_classes 'checkbox', options.delete(:inline) && 'inline'

    self.label(attribute, :class => klasses) do
      template.concat super(attribute, options, checked_value, unchecked_value)
      template.concat text
      yield if block_given?
    end
  end
end

expected.html

<div class="controls">
  <label class="checkbox" for="user_remember_me">
    <input name="user[remember_me]" type="hidden" value="0">
    <input id="user_remember_me" name="user[remember_me]" type="checkbox" value="1">
    remember me
  </label>
</div>

form.html.haml

= twitter_bootstrap_form_for(resource, :as => resource_name, :url => session_path(resource_name), :html => { :class => 'form-horizontal'}) do |f|
  = f.email_field :email
  = f.password_field :password

  = f.label :remember_me do |controls|
    = controls.check_box :remember_me, t('.remember_me')

  = f.actions do
    = f.submit t('.submit')

got.html

<div class="controls">
  <input name="user[remember_me]" type="hidden" value="0">
  <input id="user_remember_me" name="user[remember_me]" type="checkbox" value="1">
  remember me 
  <label class="checkbox" for="user_remember_me"></label>
</div>