gitea/templates/explore/nav.tmpl

<div id="setting-menu" class="grid-1-5 panel panel-radius left">
    <p class="panel-header"><strong>{{.i18n.Tr "explore"}}</strong></p>
    <div class="panel-body">
        <ul class="menu menu-vertical switching-list grid-1-5 left">
            <li {{if .PageIsExploreRepositories}}class="current"{{end}}><a href="{{AppSubUrl}}/explore">{{.i18n.Tr "explore.repos"}}</a></li>
        </ul>
    </div>
</div>