app/views/setting/_account_passwd.erb
<div class="panel panel-default">
<div class="panel-heading"><b>Change password</b></div>
<div class="panel-body">
<%= form_for @user, url: '/' + me.username + '/setting/account/password' do |f| %>
<div class="form-group">
<%= div_for(@email, class: 'form-group col-lg-6') do %>
<label>Old password</label>
<div>
<%= f.password_field :passwd, class: 'form-control', placeholder: 'Old password' %>
</div>
<% end %>
<div class="col-lg-6 col-lg-offset-6">
</div>
<%= div_for(@email, class: 'form-group col-lg-6') do %>
<label>New password</label>
<div>
<%= f.password_field :passwd_new, class: 'form-control', placeholder: 'New password' %>
</div>
<% end %>
<%= div_for(@email, class: 'form-group col-lg-6') do %>
<label>Confirm password</label>
<div>
<%= f.password_field :passwd_confirmation, class: 'form-control', placeholder: 'Confirm password' %>
</div>
<% end %>
<%= div_for(@email, class: 'form-group col-lg-9') do %>
<%= submit_tag 'Save password', class: 'btn btn-primary' %>
<a href="/forgot">I forgot my password</a>
<%end%>
</div>
<% end %>
</div>
</div>