{% set mainnavigation %}
    {% cache globally using key "main-navigation" %}
    {% set entries = craft.entries.section('features').all() %}

    <ul>
        {% nav entry in entries %}
            <li>
                <a href="{{ entry.url }}">{{ entry.title }}</a>
                {% ifchildren %}
                    <ul>
                        {% children %}
                    </ul>
                {% endifchildren %}
            </li>
        {% endnav %}
    </ul>

    {% endcache %}
{% endset %}

{{ mainnavigation | k4NavigationGetActivePath(url(craft.app.request.pathInfo)) | raw }}