// QuoteController.php
public function index()
{
    $quotes = Quote::approved()->orderBy('created_at', 'desc')->get();
    $categories = Category::has('approvedQuotes')->orderBy('id')->withCount('approvedQuotes')->get();

    return view('category.index', compact('quotes', 'categories'));

}

// Quote.php
class Quote extends Model
{
    public function scopeApproved($q)
    {
        $q->where('approved', true);
    }
}

// Category.php
class Category extends Model
{
    public function quote()
    {
        return $this->belongsTo(Quote::class);
    }

    public function approvedQuote()
    {
        return quote()->approved();
    }
}