app/views/users/_form.html.erb
<%= simple_form_for @user, :html => { :class => 'form-horizontal' } do |f| %>
<%= render 'shared/error_messages',:target => @user %>
<%= f.input :email %>
<%= f.input :first_name %>
<%= f.input :last_name %>
<%= f.input :can_login %>
<div class="form-actions">
<%= f.button :submit, :class => 'btn-primary' %>
<%= link_to t('.cancel', :default => t("helpers.links.cancel")),
users_path, :class => 'btn' %>
</div>
<% end %>