Use category scope instead of condition on kind on Tag

app/controllers/budgets/ballot/lines_controller.rb

@@ -67,7 +67,7 @@ module Budgets
         end
 
         def load_categories
-          @categories = ActsAsTaggableOn::Tag.where("kind = 'category'").order(:name)
+          @categories = ActsAsTaggableOn::Tag.category.order(:name)
         end
 
         def load_ballot_referer

app/controllers/budgets/investments_controller.rb

@@ -118,7 +118,7 @@ module Budgets
       end
 
       def load_categories
-        @categories = ActsAsTaggableOn::Tag.where("kind = 'category'").order(:name)
+        @categories = ActsAsTaggableOn::Tag.category.order(:name)
       end
 
       def tag_cloud

app/controllers/concerns/commentable_actions.rb

@@ -92,7 +92,7 @@ module CommentableActions
     end
 
     def load_categories
-      @categories = ActsAsTaggableOn::Tag.where("kind = 'category'").order(:name)
+      @categories = ActsAsTaggableOn::Tag.category.order(:name)
     end
 
     def parse_tag_filter

app/controllers/management/budgets/investments_controller.rb

@@ -64,7 +64,7 @@ class Management::Budgets::InvestmentsController < Management::BaseController
     end
 
     def load_categories
-      @categories = ActsAsTaggableOn::Tag.where("kind = 'category'").order(:name)
+      @categories = ActsAsTaggableOn::Tag.category.order(:name)
     end
 
 end

config/initializers/acts_as_taggable_on.rb

@@ -58,7 +58,7 @@ module ActsAsTaggableOn
     end
 
     def self.category_names
-      Tag.where("kind = 'category'").pluck(:name)
+      Tag.category.pluck(:name)
     end
 
     def self.spending_proposal_tags