On Create/POST Pages
<input type="text" value="{{old('name)}}">
<textarea>{{old('notes')}}</textarea>
<div class="form-group">
<label for="category">Product</label>
<select name="category_id" id="category_id" class="form-control">
@foreach($category as $item)
<option value="{{$item->id}}"
@if($item->id == old('category_id'))
selected
@endif
>{{$item->title}}</option>
@endforeach
</select>
</div>
On Update Pages
<input type="text" value="{{old('name', $client->name)}}">
<textarea>{{old('notes', $client->description)}}</textarea>