List tournaments by year in the dropdown menu.

_data/tournaments.yml

@@ -1,5 +1,29 @@
-- url:   2014/2-summertime/
-  title: Summertime
+- year: 2014
+  events:
 
-- url:   2014/1-tabiyas/
-  title: Табии
+    - title: Summertime
+      url:   https://www.linux.org.ru/forum/talks/10452081
+      dir:   2-summertime
+
+    - title: Табии
+      url:   https://www.linux.org.ru/forum/talks/10099832
+      dir:   1-tabiyas
+
+- year: 2013
+  events:
+
+    - title: Knockout!
+      url:   https://www.linux.org.ru/forum/talks/9840999
+      dir:   4-knockout
+
+    - title: Осень
+      url:   https://www.linux.org.ru/forum/talks/9539078
+      dir:   3-autumn
+
+    - title: Великолепная дюжина
+      url:   https://www.linux.org.ru/forum/talks/9088834
+      dir:   2-great12
+
+    - title: Первый турнир
+      url:   https://www.linux.org.ru/forum/talks/8799973
+      dir:   1-lorchess

_includes/navbar.html

@@ -14,13 +14,25 @@
   <div class="collapse navbar-collapse">
     <ul class="nav navbar-nav">
       <li class="dropdown">
-        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Турниры <b class="caret"></b></a>
-        <ul class="dropdown-menu">
-          {% for trn in site.data.tournaments %}
-            <li><a href="/{{ trn.url }}">{{ trn.title }}</a></li>
+        <a href="#" class="dropdown-toggle" id="dropdownMenu" data-toggle="dropdown">Турниры <b class="caret"></b></a>
+
+        <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
+          {% capture last_year %}{{ site.data.tournaments | map: 'year' | last }}{% endcapture %}
+          {% for entry in site.data.tournaments %}
+            {% capture year %}{{ entry.year }}{% endcapture %}
+            <li role="presentation" class="dropdown-header">{{ year }}-й год</li>
+            {% for trn in entry.events %}
+              <li role="presentation">
+                <a role="menuitem" tabindex="-1" href="/{{ year }}/{{ trn.dir }}">{{ trn.title }}</a>
+              </li>
+            {% endfor %}
+            {% unless year == last_year %}
+              <li role="presentation" class="divider"></li>
+            {% endunless %}
           {% endfor %}
         </ul>
       </li>
+
       <li><a href="/reviews/">Обзоры</a></li>
     </ul>
   </div><!-- /.navbar-collapse -->