  <div class="siteSidebar S-flexItem-noFlex spu-background-light3 spu-padStart-20">
    <div class="so-siteHeader">
      {{> siteLogo }}
    </div>
    <div>
      <h2 class="mainSectionTitle spu-color-dark2">Learn</h2>
    </div>
    <div class="spu-borderTop-1 spu-borderColor-light2 spu-padTop-20">

			<ul class="pageNavList">
				{{>sidebarSubMenu title="Get Started" glob="learn/get-started/*.html"}}
				{{>sidebarSubMenu title="Concepts" glob="learn/concepts/*.html"}}
				
				{{#sidebarSubMenu "Integration Guides"}}
						<li class="pageNavList__item">TODO</li>
				{{/sidebarSubMenu}}

				{{#sidebarSubMenu "Horizon"}}
						<li class="pageNavList__item">TODO</li>
				{{/sidebarSubMenu}}

				{{#sidebarSubMenu "Stellar Core"}}
						<li class="pageNavList__item">TODO</li>
				{{/sidebarSubMenu}}


			</ul>
			
    </div>
  </div>



  <div class="siteSidebar S-flexItem-noFlex spu-background-light3 spu-padStart-20">
    <div class="so-siteHeader">
      {{> siteLogo }}
    </div>
    <div>
      <h2 class="mainSectionTitle spu-color-dark2">Learn</h2>
    </div>
    <div class="spu-borderTop-1 spu-borderColor-light2 spu-padTop-20">

			<ul class="pageNavList">
				{{>sidebarSubMenu title="Get Started" glob="learn/get-started/*.html"}}
				{{>sidebarSubMenu title="Concepts" glob="learn/concepts/*.html"}}
				
				{{#sidebarSubMenu "Integration Guides"}}
						<li class="pageNavList__item">TODO</li>
				{{/sidebarSubMenu}}

				{{#sidebarSubMenu "Horizon"}}
					{{#eachFile "horizon/learn/*.html"}}
						<li class="pageNavList__item"><a href="/{{path}}">{{file.title}}</a></li>
					{{/eachFile}}
					{{#sidebarSubMenu "Tutorials"}}
						{{#eachFile "horizon/learn/tutorials/*.html"}}
							<li class="pageNavList__item"><a href="/{{path}}">{{file.title}}</a></li>
						{{/eachFile}}
					{{/sidebarSubMenu}}
				{{/sidebarSubMenu}}

				{{>sidebarSubMenu title="Stellar Core" glob="stellar-core/*.html"}}


			</ul>
			
    </div>
  </div>



Add horizon and stellar-core learn submenus
Add horizon and stellar-core learn submenus
