wp_nav outputs escaped quotes

Hi, i’m using this:

<?php
$defaults = array( theme_location => '',
'menu' => '4',
'container' => 'div',
'container_class' => 'menu-{menu slug}-container',
'container_id' => '',
'menu_class' => 'nyMainNav',
'menu_id' => '',
'echo' => true,
'fallback_cb' => 'wp_page_menu',
'before' => '',
'after' => '',
'link_before' => '',
'link_after' => '',
'items_wrap' => '<ul id=\"%1$s\" class=\"%2$s\">%3$s</ul>',
'depth' => 1,
'walker' => '');
?>

<?php wp_nav_menu( $defaults ); ?>

And it get’s rendered in browser exactly like this:

<div class="menu-{menu slug}-container"><ul id=\"menu-mainmenu\" class=\"nyMainNav\"><li id="menu-item-30" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-30"><a href="https://site.com/v2/?page_id=5">Products Page</a></li>
<li id="menu-item-31" class="menu-item menu-item-type-post_type menu-item-object-page current-menu-item page_item page-item-18 current_page_item menu-item-31"><a href="https://site.com/v2/?page_id=18">About</a></li>
<li id="menu-item-32" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-32"><a href="https://site.com/v2/?page_id=20">Contact</a></li>
</ul></div>

note ..id=\”menu-mainmenu\” class=\”nyMainNav\”><li id=”menu-item-30″..

Is that as it should be?