more button works according to categories

lib/orbit_app/helper/default_widget_tag_helper.rb

@@ -12,10 +12,11 @@ module DefaultWidgetTagHelper
       if param.is_a?(Array) and !param.blank?
         params_str << param.collect{|t| "#{index}[]=#{t}"}.join("&")
         params.delete index
+        params_str = params_str + "&"
       end
     end  
-    
     params_str = params_str + (params_str.eql?("?") ? params.to_param : "&#{params.to_param}" )
+    params_str = params_str + "&click=more_btn&page_part_id=#{@params[:part_id]}"
       content_tag :div,:class=> 'more' do 
   	 link_to I18n.t(@more_link[:label_i18n]),[eval("#{@more_link[:path_method]}"),params_str].join()
       end