This gist shows some approaches for using haml without repeating inner content

dry_inner_content_using_capture.haml

- content_for(:inner_content) do
  = render :partial => "inner_content"

- if some_condition
  %outertag1= yield :inner_content
- else
  %outertag2= yield :inner_content

dry_inner_content_using_haml_tag.haml

- haml_tag(some_condition ? "outertag1" : "outertag2") do
  = render :partial => "inner_content"

dry_inner_content_using_partials.haml

- if some_condition
  %outertag1= render :partial => "inner_content"
- else
  %outertag2= render :partial => "inner_content"

dry_inner_content_using_strings.haml

- if some_condition
  = "<outertag1>"
- else
  = "<outertag2>"

= render :partial => "inner_content"


- if some_condition
  = "</outertag1>"
- else
  = "</outertag2>"