fix filters typo

lib/widget/filters.rb

@@ -35,7 +35,7 @@ class Widget::Filters < Widget::Base
   def render_filters
     active_filters = @query.filters.select {|f| f.class.display? }
     engine::Filter.all.collect do |filter|
-      opts = :id => "tr_#{filter.underscore_name}", :class => "#{filter.underscore_name}"
+      opts = {:id => "tr_#{filter.underscore_name}", :class => "#{filter.underscore_name}"}
       active_instance = active_filters.detect {|f| f.class == filter }
       if active_instance
         opts[:"data-selected"] = true