snippet.rb

# Example Controller

class SomeController < ApplicationController
  def index
    @categorized_products = Product.categorized
  end
end

# Example view

<h2>Boards</h2>
<h3>Foundation</h3>
<%- @categorized_products['boards/foundation'].each do |board| -%>
  <%= link_to(h(board.name), show_board_path(board.name_data)) %>
<%- end -%>
<h3>Mobility</h3>
<%- @categorized_products['boards/mobility'].each do |board| -%>
  <%= link_to(h(board.name), show_board_path(board.name_data)) %>
<%- end -%>

# You can access any categorization using
# @categorized_products['category/subcategory']