module BlockLinkTo
  def self.included(base)
    base.class_eval do
      alias_method_chain :link_to, :block
    end
  end
  
  def link_to_with_block(*args, &block)
    return link_to_without_block(*args) unless block
    
    text = capture(&block)
    concat(link_to_without_block(*[text] + args), block.binding)
  end
end

ActionView::Helpers::UrlHelper.module_eval do
  include BlockLinkTo
end