Undefined offset: 2 when I delete an element of the array and I want to return the rest of them

I am getting this error whenever I try to delete and element in the array. It only work when I delete everything. But I want to delete one by one. this is delete function

 public function delete($id){

      $user_id = auth() ->user()->id;
      $card = travel_plan::all()->where('travel_id', $user_id);
      foreach($card as $cardId){
        $cardd = $cardId;
    }  //->where('city_name', $uo)->first();
      $cardd->delete();

  return redirect('/home')->with('success', 'Post Removed');

}

this is my delete button

 {!!Form::open(['action'=>['TravelPlanController@delete','id' =>$cardd[]],'method'=>'POST','class'=>''])!!}

this is how I retrieved the id

 $cardd = array();
      $card = travel_plan::all()->where('travel_id', $user_id);
     foreach($card as $cardId){
          $cardd [] = $cardId ->id;
      }

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