Set-up different Nav-bar

Hi all

I have a little problem. I’m using Theme Forest X and I would like to have different main menu depend on the pages. (So I need different nav-bar on each pages)

I ask them solution for that but they said it’s not sipported by the theme.

I search on Google and I found solution. It works well, very well actually except that the menu doesnt appear with the good style

It should be like
Link 1 Link 2 Link 3 link 4

but appear like
*link 1
*link 2
*link 3
*link 4

I copy the code here (Found on https://wpquestions.com/question/showChrono/id/8689)

So in my function php I added:

add_action( 'add_meta_boxes', 'ashu_add_custom_box' );

function ashu_add_custom_box(){

	if ( function_exists('add_meta_box') ) {

		add_meta_box( 'page_custom_menu','page-menu', 'page_custom_menu_box', 'page', 'side','high');

	}

}

function page_custom_menu_box(){

	global $post;

	if ( metadata_exists( 'post', $post->ID, 'page_menu' ) ) {

		$menu_id = get_post_meta( $post->ID, 'page_menu', true );

	} 

	$entries = get_terms( 'nav_menu', array( 'hide_empty' => false ) );

	echo '<select class="postform" id="page_menu" name="page_menu"> ';

	echo '<option value="">Select...</option>  ';

	foreach ($entries as $key => $entry){

		$id = $entry->term_id;

		$title = $entry->name;

		if ( $id == $menu_id ){

			$selected = "selected='selected'";	

		}else{

			$selected = "";		

		}

		echo"<option $selected value='". $id."'>". $title."</option>";

	}

	echo '</select>';

}

add_action('save_post', 'save_postdata');

function save_postdata( $post_id ) {   

    global $post;

	if( !isset($_POST['page_menu']) )

		return;

	$data = $_POST['page_menu'];

    if(get_post_meta($post_id, 'page_menu') == "") { 

       add_post_meta($post_id, 'page_menu', $data, true);

    }elseif($data != get_post_meta($post_id, 'page_menu', true)) { 

        update_post_meta($post_id, 'page_menu', $data); 	

    }elseif($data == "")  { 

       delete_post_meta($post_id, 'page_menu', get_post_meta($post_id, 'page_menu', true));

	}

}

And in my _nav-primary.php ( in “public_html/wp-content/themes/x/framework/views/global”)
I added:

<?php

if( is_page() && get_post_meta( $post->ID, 'page_menu', true )!='' ){

	global $post;

	$menu_id = get_post_meta( $post->ID, 'page_menu', true );

	wp_nav_menu( array( 'container_class' => 'menu-header', 'menu' => $menu_id ) );

}else{

	//default menu

	wp_nav_menu( array( 'container_class' => 'menu-header', 'theme_location' => 'primary' ) );

}

?>

I guess I just have to give the good style to my menu but I have no idea how to do it.

I hope you can help me with that.

thx a lot