Hi I am trying to group a set of arrays from a JSON by its key.

The JSON I have looks like this:

{
  "Borges Group": [
    {
      "id": 936,
      "name": "Borges 2",
      "price": 9.99,
      "dsc": "a desc of the item",
      "options": [
        {
          "Drink 1": [
            {
              "name": "Fanta"
            },
            {
              "name": "7UP"
            },
            {
              "name": "Water"
            }
          ]
        },
        {
          "Drink 2": [
            {
              "name": "Fanta"
            },
            {
              "name": "7UP"
            },
            {
              "name": "Water"
            }
          ]
        },
        {
          "Side": [ { "name": "Pasta" }, { "name": "Rice" } ]
        }
      ]
    }
  ]
}

So I iterate through it with PHP like this, I am only including the options part:

foreach ($product->options as $var) {
        foreach ($var as $b){
            foreach ($b as $c){
            echo $c->name."<br>";
            }
        }
    }

And this gives me:

Fanta 7UP Water Fanta 7UP Water Pasta Rice

Which is fine because it is supposed to, I wanted to group it so that it shows something like this instead:

Drink 1 - Fanta, 7UP, Water

Drink 2 - Fanta, 7UP, Water

Side - Pasta, Rice

I want to create a dropdown option for each of the arrays (Drink 1, Drink 2 and Side) later on, hence the need to group them. What might be a good way to achieve this? Please feel free to suggest improvements on the code too. Cheers!