gistfile1.rb

  def menu_item( name, url_options={}, section_url=nil, &block)
    #debugger
    current = current_page?(url_options) 
    content = content_tag :li, :class => (current ? 'current' : nil) do
      link_to(name, url_options) +
      (block.nil? ? '' : capture(&block))
    end
    block.nil? ? concat(content, binding) : concat(content, block.binding) 
  end

# what to put for binding in concat(content, binding) ?

#====================
# case: simple block
<% menu_item 'Project', overview_project_path(current_project) do %>
  Hello
<% end %>

=> works!
  <li><a href="/projects/poetry_contest/overview">Project</a>
    Hello
  </li>

#====================
# case: no block
<% menu_item 'Project settings', edit_project_path(current_project) %>

=> ERROR
undefined local variable or method `_erbout' for #<ActionView::Base:0xaaad2c8>