{% load url from future %}
<div class="navbar">
    <div class="navbar-inner">
        <div class="container">
            <a class="brand" href="{% url 'xdata_home' %}">Crossword Drill</a>
            <ul class="nav">
                <li><a href="{% url 'xdata_home' %}">Home</a></li>
                <li><a href="{% url 'xdata_drill' %}">Drill</a></li>
            </ul>
        </div>
    </div>
</div>