app/common/directives/app-navigation.html

<nav>
	<ul id="nav__top-level" ng-style="navStyle">
		<li>
			<a class="btn-overview"  ng-class="{opened: firstLevel == 'overview'}" href="#/overview/system" ng-click="change('overview')" tabindex="1">
			<span class="">Server Overview</span></a>
		</li>
		<li>
			<button class="btn-health" ng-class="{opened: firstLevel == 'server-health'}" ng-click="change('server-health')" tabindex="9">
			<span>Server Health</span></button>
		</li>
		<li>
			<button class="btn-control" ng-class="{opened: firstLevel == 'server-control'}" ng-click="change('server-control')">
			<span>Server Control</span></button>
		</li>
		<li>
			<button class="btn-config" ng-class="{opened: firstLevel == 'configuration'}" ng-click="change('configuration')">
			<span>Configuration</span></button>
		</li>
		<li>
			<button class="btn-firmware" ng-class="{opened: firstLevel == 'firmware'}" ng-click="change('firmware')">
			<span>Firmware</span></button>
		</li>
		<li>
			<button class="btn-users" ng-class="{opened: firstLevel == 'users'}" ng-click="change('users')">
			<span>Users</span></button>
		</li>
	</ul>
	<ul class="nav__second-level btn-overview" ng-style="navStyle" ng-class="{opened: (showSubMenu && firstLevel == 'overview')}">
		<li ng-class="{'active': (path == '/overview' || path == '/overview/system')}" tabindex="2">
			<a href="#/overview/system" ng-click="closeSubnav()">System overview</a></li>
	</ul>
	<ul class="nav__second-level btn-health" ng-style="navStyle" ng-class="{opened: (showSubMenu && firstLevel == 'server-health')}">
		<li ng-class="{'active': (path == '/server-health/event-log')}"><a href="#/server-health/event-log" tabindex="7" ng-click="closeSubnav()">Event log</a></li>
		<li ng-class="{'active': (path == '/server-health/inventory-overview' || path == '/server-health/inventory')}" ng-click="closeSubnav()"><a href="#/server-health/inventory-overview">Hardware inventory</a></li>
		<li ng-class="{'active': (path == '/server-health/sensors-overview' || path == '/server-health/sensors')}"><a href="#/server-health/sensors-overview" ng-click="closeSubnav()">Sensor data</a></li>
		<!--<li ng-class="{'active': (path == '/server-health/power-consumption')}"><a href="#/server-health/power-consumption" tabindex="4" ng-click="closeSubnav()">Power consumption</a></li>-->
		<li ng-class="{'active': (path == '/server-health/unit-id')}"><a href="#/server-health/unit-id" tabindex="6" ng-click="closeSubnav()">Unit ID</a></li>
		<!--<li ng-class="{'active': (path == '/server-health/diagnostics')}"><a href="#/server-health/diagnostics" ng-click="closeSubnav()">Diagnostics</a></li>-->
	</ul>
	<ul class="nav__second-level btn-control" ng-style="navStyle" ng-class="{opened: (showSubMenu && firstLevel == 'server-control')}">
		<li ng-class="{'active': (path == '/server-control' || path == '/server-control/power-operations')}" tabindex="3"><a href="#/server-control/power-operations" ng-click="closeSubnav()">Server power operations</a></li>
		<li ng-class="{'active': (path == '/server-control/bmc-reboot')}"><a href="#/server-control/bmc-reboot" tabindex="8" ng-click="closeSubnav()">Reboot BMC</a></li>
		<li ng-class="{'active': (path == '/server-control/remote-console')}"><a href="#/server-control/remote-console" tabindex="5" ng-click="closeSubnav()">Remote console</a></li>
	</ul>
	<ul class="nav__second-level btn-firmware" ng-style="navStyle" ng-class="{opened: (showSubMenu && firstLevel == 'configuration')}">
		<li ng-class="{'active': (path == '/configuration' || path == '/configuration/network')}"><a href="#/configuration/network" ng-click="closeSubnav()">Network settings</a></li>
		<!--<li ng-class="{'active': (path == '/configuration/date-time')}"><a href="#/configuration/date-time" ng-click="closeSubnav()">Date & Time</a></li>-->
		<li ng-class="{'active': (path == '/configuration/security')}"><a href="#/configuration/security" ng-click="closeSubnav()">Security</a></li>
		<!--<li ng-class="{'active': (path == '/configuration/file')}"><a href="#/configuration/file" ng-click="closeSubnav()">Configuration File</a></li>-->
	</ul>
	<ul class="nav__second-level btn-firmware" ng-style="navStyle" ng-class="{opened: (showSubMenu && firstLevel == 'firmware')}">
		<li ng-class="{'active': (path == '/firmware' || path == '/firmware/bmc')}"><a href="#/firmware/bmc" ng-click="closeSubnav()">BMC firmawre</a></li>
		<li ng-class="{'active': (path == '/firmware/server')}"><a href="#/firmware/server" ng-click="closeSubnav()">Server firmware</a></li>
	</ul>
	<ul class="nav__second-level btn-users" ng-style="navStyle" ng-class="{opened: (showSubMenu && firstLevel == 'users')}">
		<li ng-class="{'active': (path == '/users' || path == '/users/manage-accounts')}"><a href="#/users/manage-accounts" ng-click="closeSubnav()">Manage user account</a></li>
	</ul>
</nav>