app/views/backend/sessions/new.html.erb
<div class="border-form-div">
<h2>ConexiĆ³n</h2>
<%= simple_form_for(resource, as: resource_name, url: session_path(resource_name), html: {class: 'form-horizontal' }) do |f|%>
<div class="border-form-div form-inputs">
<%= f.input :email, :required => false, :autofocus => true %>
<%= f.input :password, label: "ContraseƱa", :required => false %>
<%= f.input :remember_me, label: "Recordarme", :as => :boolean if devise_mapping.rememberable? %>
</div>
<div class="form-actions">
<%= f.button :submit, 'Login' %>
</div>
<% end %>
<%= render 'backend/shared/links' %>
</div>
<div class="span3">
</div>