## Nonworking code

  def sidebar_box(name, &block)
    content_tag :div, :class => "sblock" do
      content_tag :div, :class => "sblock-cnt" do
        yield
      end
    end
  end

##  Desired Syntax

<% sidebar_box do %>
  <h3>My content</h3>
<% end >

## Desired HTML

  <div class="sblock">
    <div class="sblock-cnt">
      <h3>My content</h3>
    </div>
  </div>