Foreach inside Foreach based on column value - laravel

Question

I have an sql table knowledgebase like so
id , categoryid, title
id
categoryid
title
1
1
apple
2
1
fb
3
2
google
4
2
DB
5
3
Reebok
In my laravel blade, I am trying to create a tree view to look like the following
-1
--apple
--FB
-2
--google
--DB
-3
--Reebok
My controller does a basic query and returns the entire table to the view. I am a newbie to laravel so far, I can get a basic table to work like
#foreach($knowledgebase as $key => $value)
<tr>
<td>{!! $knowledgebase ->id !!}</td>
<td>{!! $knowledgebase ->title!!}</td>
<td>{!! $knowledgebase ->categoryid !!}</td>
</tr>
#endforeach
How would I iterate categroyid column , display first category and all child titles and then move on to the next categoryid.
Update
public function show($id) {
//get article
$knowledgebase = \App\Models\Knowledgebase::Where('knowledgebase_slug', request('knowledgebase_slug'))->first();
return view('knowledgebase', compact('knowledgebase'));
}

Answer 1

You will need to retrieve in controller the categories before ($categories)
#foreach($categories as $category)
<tr>
<td>{{ $category->id }}</td>
<td>{{ $category->title}}</td>
<td>{{ $category->categoryid }}</td>
</tr>
#endforeach

Answer 2

Anyways, I managed to solve this by adding a function children in my model. So in my Model added
public function children(){
return $this->hasMany('App\Models\Knowledgebase', 'categoryid');
}
After this, I simply called it as a foreach inside my foreach
#foreach($categories as $category)
<li>{{ $category->title}}</li>
#if($category->children)
#foreach($category->children as $child)
<ul>
<li class="pl-3"> {{ $child->title}} </li>
</ul>
#endforeach
#endif
#endforeach