<div class=“seriesContext”>

<div class="btn-group">
    <button type="button" data-toggle="dropdown" class="btn btn-primary dropdown-toggle">Series Demo <span class="caret"></span></button>
    <ol class="dropdown-menu">
        {% assign pages = site.pages | sort:"weight"  %}
        {% for p in pages %}
        {% if p.series == "ACME series" %}
        {% if p.url == page.url %}
        <li class="active"> → {{p.weight}}. {{p.title}}</li>
        {% else %}
        <li>
            <a href="{{p.url | remove: "/"}}">{{p.weight}}. {{p.title}}</a>
        </li>
        {% endif %}
        {% endif %}
        {% endfor %}
    </ol>
</div>

</div>