resources/views/navbar.blade.php
<nav class="navbar navbar-expand">
<div class="container" role="tablist">
<ul class="nav navbar-nav">
@if ($episodes->isNotEmpty())
<li class="nav-item">
<a class="nav-link active" id="episode-publishing-tab" data-toggle="tab" href="#episode-publishing" role="tab" aria-controls="episode-publishing" aria-selected="true">
@lang('podcast.publishing')
</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbar-content-folders" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
@lang('podcast.folders')
</a>
<div class="dropdown-menu" aria-labelledby="navbar-content-folders">
@foreach ($episodes->pluck('folder')->reverse()->unique() as $folder)
<a class="dropdown-item" aria-labelledby="episode-folder-{{ Illuminate\Support\Str::slug($folder) }}-tab" data-toggle="tab" href="#episode-folder-{{ Illuminate\Support\Str::slug($folder) }}" role="tab" aria-controls="episode-folder-{{ Illuminate\Support\Str::slug($folder) }}" aria-selected="false">
{{ $folder }}
</a>
@endforeach
</div>
</li>
@endif
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="btn btn-primary btn-sm" href="{{ url('feed') }}">
@lang('podcast.feed')
</a>
</li>
</ul>
</div>
</nav>