app/views/devise/passwords/edit.html.erb
<div class="devise">
<h2>Change your password</h2>
<%= form_for(resource, :as => resource_name, :url => password_path(resource_name), :html => { :method => :put }) do |f| %>
<%= devise_error_messages! %>
<%= f.hidden_field :reset_password_token %>
<div class="form-group">
<%= f.label :password, "New password", :class => "control-label" %>
<%= f.password_field :password, :class => "form-control" %>
</div>
<div class="form-group">
<%= f.label :password_confirmation, "Confirm new password", :class => "control-label" %>
<%= f.password_field :password_confirmation, :class => "form-control" %>
</div>
<p><%= f.submit "Change my password", :class => "btn btn-primary" %></p>
<% end %>
<p><%= render :partial => "devise/shared/links" %></p>