# controller

class TestController < ApplicationController
  def index
    @urls = %w{http://google.com/ http://halorgium.net}
  end
end

# helper

module TestHelper
  def pretty_links_for(urls)
    content = urls.inject([]) do |content,url|
      content << capture do
        auto_link url
      end
    end
    content.to_sentence
  end
end

# view [rhtml]

<%= pretty_links_for(@urls) %>