MehulBawadia/Category.php

## category.blade.php
<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>Category and Sub Category</title>
</head>
<body>
    <div>
        <h1>All Categories</h1>

        <ul>
            @foreach($categories as $category)
                <li>{{ $category->name }}</li>

                {{-- `isNotEmpty` collection method was added in Laravel 5.3 --}}
                @if($category->childs->isNotEmpty())
                    @include('sub_category_list', [
                        'childs' => $category->childs
                    ])
                @endif
            @endforeach
        </ul>
    </div>
</body>
</html>

## Category.php
<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'slug', 'parent_id'
    ];

    /**
     * A Category has many child categories
     *
     * @return void
     */
    public function childs()
    {
        return $this->hasMany(Category::class, 'parent_id', 'id');
    }
}

## sub_category_list.blade.php
<ul>
    @foreach($childs as $parent)
        <li>
            {{ $parent->name }}

            {{-- `isNotEmpty` collection method was added in Laravel 5.3 --}}
            @if($parent->childs->isNotEmpty())
                @include('sub_category_list', [
                    'childs' => $parent->childs
                ])
            @endif
        </li>
    @endforeach
</ul>

## web.php
<?php

Route::get('/categories', function () {
    $categories = \App\Category::whereParentId(0)->get();

    return view('welcome', compact('categories'));
});
	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">

	<title>Category and Sub Category</title>
	</head>
	<body>
	<div>
	<h1>All Categories</h1>

	<ul>
	@foreach($categories as $category)
	<li>{{ $category->name }}</li>

	{{-- `isNotEmpty` collection method was added in Laravel 5.3 --}}
	@if($category->childs->isNotEmpty())
	@include('sub_category_list', [
	'childs' => $category->childs
	])
	@endif
	@endforeach
	</ul>
	</div>
	</body>
	</html>
	<?php

	namespace App;

	use Illuminate\Database\Eloquent\Model;

	class Category extends Model
	{
	/**
	* The attributes that are mass assignable.
	*
	* @var array
	*/
	protected $fillable = [
	'name', 'slug', 'parent_id'
	];

	/**
	* A Category has many child categories
	*
	* @return void
	*/
	public function childs()
	{
	return $this->hasMany(Category::class, 'parent_id', 'id');
	}
	}
	<ul>
	@foreach($childs as $parent)
	<li>
	{{ $parent->name }}

	{{-- `isNotEmpty` collection method was added in Laravel 5.3 --}}
	@if($parent->childs->isNotEmpty())
	@include('sub_category_list', [
	'childs' => $parent->childs
	])
	@endif
	</li>
	@endforeach
	</ul>
	<?php

	Route::get('/categories', function () {
	$categories = \App\Category::whereParentId(0)->get();

	return view('welcome', compact('categories'));
	});