erbowns.html.erb

<%= content_tag :header do %>
  <%= content_tag :div, content_tag(:h2, '1-888-761-2627'), id: "header-left", class: "cms-editable" %>
  <%= content_tag :div, image_tag("sponsornation-logo.png", :size => "662x218"), id: "header-mid" %>
  <%= content_tag :div, render(partial: 'shared/social_buttons'), id: "header-right" %>
<% end %>

--- VS ---

<header>
  <div id="header-left" class="cms-editable">
    <h2> 1-888-761-2627</h2>
  </div>
  <div id="header-mid">
    <%= image_tag("sponsornation-logo.png", :size => "662x218") %>
  </div>
  <div id="header-right">
    <%= render partial: 'shared/social_buttons' %>
  </div>
</header>