Rails sanitize() method usage

environment.rb

# Add safe tags to sanitize method

Rails::Initializer.run do |config|
  config.action_view.sanitized_allowed_tags = 'table', 'tr', 'td'
  config.action_view.sanitized_allowed_attributes = 'id', 'class', 'style'
end

sanitize.rb

tags = %w(a acronym b strong i em li ul ol h1 h2 h3 h4 h5 h6 blockquote br cite sub sup ins p)
s = sanitize(user_input, :tags => tags, :attributes => %w(href title))

# http://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html#M001588