site/_src/_includes/menu-main.html

<nav class="menu menu--main">
    <div class="row row--wide">

        <div class="grid grid--full grid-medium--columns grid--center">
            <div class="grid__col grid__col--2">
                <a class="menu__logo" href="/">
                    <svg class="logo logo--sm logo--white--green" aria-labelledby="title">
                        <title>Logo</title>
                        <use xlink:href="/assets/img/sprite.svg#logo"></use>
                    </svg>
                </a>
                {% if site.hiring == true %}
                    <a class="menu__hiring" href="https://github.com/bigchaindb/org/tree/master/jobs" rel="external">
                        <svg class="icon icon--suitcase"><use xlink:href="/assets/img/sprite.svg#icon-suitcase"></use></svg>
                        We're hiring!
                    </a>
                {% endif %}
            </div>

            <div class="grid__col grid__col--4">

                <div class="menu-overflow">
                    {% for link in site.data.menus.main %}

                        {% assign active = nil %}
                        {% if page.url contains link.url %}
                            {% assign active = 'active' %}
                        {% endif %}

                        {% if link.items %}
                            <div class="dropdown">
                                <a  class="menu__link {{ active }} js-tracking-menu dropdown-toggle"
                                    data-toggle="dropdown"
                                    aria-haspopup="true"
                                    aria-expanded="false"
                                    id="dropdownMenuButton"
                                    href="{{ link.url }}">{{ link.title }}
                                </a>
                                <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                                    {% for item in link.items %}
                                         {% assign active = nil %}
                                         {% if page.url contains item.url %}
                                            {% assign active = 'active' %}
                                        {% endif %}
                                        <a class="dropdown-item {{ active }}" href="{{ item.url }}">{{ item.title }}</a>
                                    {% endfor %}
                                </div>
                            </div>
                        {% else %}
                            <a class="menu__link {{ active }} js-tracking-menu" href="{{ link.url }}">{{ link.title }}</a>
                        {% endif %}

                    {% endfor %}
                </div>

            </div>
        </div>
    </div>
</nav>