Laravel send mail with multiple check box value

i'm trying to make inquiry form where costumer fill up form then check the value on the checkbox then once they submit form will send email to me listing all the information the customer selected, now problem is i want to change this[event_id,requirement_id] instead of id replace it with name those two id parameter is from my two model listed below.

Model:
Event:[id,name]
Requirement:[id,name] 

Controller:

public function store(Request $request)
    {



        $summary=[
            'name' => $request->fullname,
            'email' => $request->email,
            'company' => $request->company,
            'event' => $request->event_id,
            'requirement' => $request->requirement_id
        ];
        return $summary; 
       Mail::send('emails.contact-message',[
        ],function($mail) use($summary){

            $mail->from('myemail@gmail.com', 'tester');
            $mail->to('myemail@gmail.com')->subject('Contact Message');
        });
        return redirect()->back();


    }

This is the result of my return request:

{"name":"myname","email":"myemail@gmail.com","company":"mycompany","event":["1","2"],"requirement":["1","2"]}

As you can see the array Event has value of 1 and 2 i wanted to replace it with its name output should be [Wedding,Birthday] i'm sorry for my bad english hope you understand me..