invoiceninja/resources/views/portal/default/sidebar.blade.php

<div class="app-body">
    <div class="sidebar">
        <nav class="sidebar-nav">
            <ul class="nav">
                @foreach($sidebar as $row)
                    <li class="nav-item">
                        <a class="nav-link" href="{{ route($row['url']) }}">
                            <i class="nav-icon {{$row['icon']}}"></i> {{ $row['title'] }}
                        </a>
                    </li>
                @endforeach
            </ul>
        </nav>
            <button class="sidebar-minimizer brand-minimizer" type="button"></button>
    </div>