MenuButton.cs

//This scirpt just changes static variable in 2 scripts that tells 2 two scripts on which button you pressed

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MenuButton : MonoBehaviour
{
    private int whichButton;
    public SubMenuContent obj;

    void Start()
    {
        if(gameObject.transform.parent.name != "DefaultButton")
        whichButton = int.Parse(gameObject.transform.parent.name);
    }

    public void OnClick()
    {
        Debug.Log(whichButton);
        SubMenuContent.SetButton(gameObject.transform.parent.name);
        MenuContent.SetButton(whichButton);
        obj.UpdateList();
    }

}