Problems in adding object from one view to a mutableArray in another view

Hi everyone I have been building an app and have met some problems. My app has two viewControllers. One is MenuViewController and another one is MainViewController.

I want to pass a string from MainViewController to a mutableArray in MenuViewController, but have no idea how.

Here are my codes:

<MenuViewController.h>
#import <UIKit/UIKit.h>

@interface MenuViewController : UITableViewController {
    NSMutableArray *secondFavourite;
}

@property (nonatomic, strong) NSMutableArray *secondFavourite;

@end

.

<MenuViewController.m>
#import "MenuViewController.h"
#import "MainViewController.h"

@interface MenuViewController ()
@property (strong, nonatomic) NSArray *menu;
@end

@implementation MenuViewController
@synthesize menu;
@synthesize secondFavourite;

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.secondFavourite = [[NSMutableArray alloc] init];
    self.menu = self.secondFavourite;

}

.

<MainViewController.h>
#import <UIKit/UIKit.h>
#import <social/Social.h>

@interface MainViewController : UIViewController {
    IBOutlet UIImageView *imagepost;
    UILabel *predictionLabel;
}

- (IBAction)sampleSelector:(UIButton *)sender;
- (IBAction)showAllClick:(id)sender;
@property (nonatomic, retain) IBOutlet UILabel *predictionLabel;
@property (strong, nonatomic) NSArray *predictionArray;
@property (strong, nonatomic) UIButton *menuBtn;
@property (strong, nonatomic) NSMutableArray *fav;
@property (strong, nonatomic) IBOutlet UILabel *favLabel;
@property (strong, nonatomic) IBOutlet UITableView* tableView;
@property (nonatomic, strong) NSMutableArray *favourite;
@end

.

<MainViewController.m>

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.predictionArray = [[NSArray alloc] initWithObjects:@"Hey gurl", nil];
}

//Add to favourite

- (void) addToFav {
    self.favourite = [[NSMutableArray alloc] init];
    [self.favourite addObject:self.predictionLabel.text];
    [self.tableView reloadData];
    NSLog(@"%@", self.favourite);
}

//add to favourite button action

- (IBAction)addToFavButton:(id)sender {
    [self addToFav];

//pass data from favourite here to secondFacourite in MenuViewController (found on stack overflow)

    MenuViewController *menuViewController = [[MenuViewController alloc]initWithNibName:@"MenuViewController" bundle:nil];
    menuViewController.secondFavourite = [[NSMutableArray alloc]initWithArray:self.favourite];
    [self.navigationController pushViewController:menuViewController animated:YES];

}

I used NSLog to check that the menuViewController.secondFavourite in MainViewController successfully added the string into the array, isn't the array the same array in MenuViewController? Why doesn't the menu.tableView update and show the new string added? I am very confused and I hope someone will help me out.

Thanks for reading this.