_filters.html.haml

%ul#filters
  - @filters.each do |filter|
    %li{:"data-name" => filter.name, :href => filter_url(@url_filters.add_to_url(filter.name))} 

filters.js.coffee

$('#filters li a').live 'click', ->
  history.pushState(null, "", @href)  # This changes the url (not using hash bangs)
  $.getScript(@href)  # This will call index.js.coffee
  

filters_controller.rb

class FiltersController < ApplicationController
  def index
    @url_filters = URLFilters.parse(request.fullpath)
  end
end

index.html.haml

= javascript_include_tag :filters
= render "filters"

index.js.coffee

$('#filters li a').each ->
  # This is the part I'm having trouble with. The code below obviously won't work but hopefully it'll give you an idea of what I'm trying to do
  # But basically I want to update each url filter url to account for the new url when the url changes
  $(this).attr('href', '<%= @url_filters.add_to_url($(this).data("name")) %>')