app/views/kaminari/_next_page.html.erb
<% if current_page.last? %>
<li class="next disabled"><%= link_to raw(t 'views.pagination.next'), "#", :rel => 'next', :remote => remote %></li>
<% else %>
<li class="next"><%= link_to raw(t 'views.pagination.next'), url, :rel => 'next', :remote => remote %></li>
<% end %>