navigation.hbs

<ul>
    {{#each links}}
        <li {{#if isCurrent}}class="js-isActive"{{/if}}>
            {{#if pageExists}}
                <a href="{{href}}">{{title}}</a>
            {{else}}
                <span>{{title}}</span>
            {{/if}}

            {{{childs}}}
        </li>
    {{/each}}
</ul>