Filling selects with appropiate data

I am having issues trying to figure something out. I pass my view an array of data which takes the following form

array:4 [▼
  "data" => array:2 [▼
    2015 => array:2 [▼
      "english" => array:1 [▼
        "chips" => array:1 [▼
          0 => "img1.png"
        ]
      ]
      "french" => array:1 [▼
        "mussles" => array:1 [▼
          0 => "img1.png"
        ]
      ]
    ]
    2016 => array:2 [▼
      "indian" => array:1 [▼
        "madras" => array:1 [▼
          0 => "img1.png"
        ]
      ]
      "italien" => array:1 [▼
        "pasta" => array:1 [▼
          0 => "img1.png"
        ]
      ]
    ]
  ]
]

This stucture is obtained from scanning a directory structure, but it should be pretty consistent. The overall structure is

Year>Country>Dish>Images

I need to somehow display this data within select options. So year is pretty straight forward, I can do this

<select id="yearSelection" class="selectpicker form-control">
    @foreach($fileData["data"] as $year => $country)
        <option value=""></option>
    @endforeach
</select>

Here is my problem. So the above select will display 2015 and 2016. I then have a second select input

<select id="countrySelection" class="selectpicker form-control">
    <option value=""></option>
</select>

Now depending on what year they select is going to determine what this select should display. So if they select 2015, this select should display english and french.

How can I populate my select options based on previous selections?

Thanks

via Chebli Mohamed