app/views/hub/_navigation_index_bar.html.erb
<nav id="hub_tabs" data-current-tab="<%= params[:list] || sessions_current_user.hub_tab_order.first -%>">
<div class="navigation-bar">
<ul class='centered_navbar'>
<% sessions_current_user.hub_tab_order.each do |t| -%>
<%= content_tag(:li, link_to(t, hub_path(list: t)) , id: t) -%>
<% end -%>
</ul>
</div>
</nav>