<%= paginate @projects, :theme => 'application', :window => 2 %>
<% @projects.each_slice(3) do |projects_slice| %>
<% projects_slice.each do |project| %>

<%= project.title %>

<%= "Заказчик: " + project.customer %>

<% end %>
<% end %>
<%= paginate @projects, :theme => 'application', :window => 2 %>