Intégrer un nouveau menu sur MyBB

Code PHP :
<script type='text/javascript' src='http://sandboxgames.fr/wp-includes/js/jquery/jquery.js?ver=1.8.3'></script>
<script src="http://sandboxgames.fr/wp-content/themes/Polished/js/jquery.lavalamp.1.3.3-min.js" type="text/javascript" charset="utf-8"></script>
<script src="http://sandboxgames.fr/wp-content/themes/Polished/js/jquery.cycle.all.min.js" type="text/javascript" charset="utf-8"></script>
<script src="http://sandboxgames.fr/wp-content/themes/Polished/js/superfish.js" type="text/javascript" charset="utf-8"></script>   
<script src="http://sandboxgames.fr/wp-content/themes/Polished/js/jquery.easing.1.3.js" type="text/javascript" charset="utf-8"></script>
    
<script type="text/javascript">
//<![CDATA[
 
jQuery(function(){

        jQuery.noConflict();
    
        jQuery('ul.sf-menu').superfish({
            delay:       200,                            // one second delay on mouseout 
            animation:   {'marginLeft':'0px',opacity:'show',height:'show'},  // fade-in and slide-down animation 
            speed:       'fast',                          // faster animation speed 
            autoArrows:  true,                           // disable generation of arrow mark-up 
            onBeforeShow:      function(){ this.css('marginLeft','20px'); },
            dropShadows: false                            // disable drop shadows 
        });
        
        jQuery('ul.sf-menu ul > li').addClass('noLava');
        jQuery('ul.sf-menu > li').addClass('top-level');
        
        jQuery('ul.sf-menu > li > a.sf-with-ul').parent('li').addClass('sf-ul');
        
                
        if (!(jQuery("#footer_widgets .block_b").length == 0)) {
            jQuery("#footer_widgets .block_b").each(function (index, domEle) {
                // domEle == this
                if ((index+1)%3 == 0) jQuery(domEle).after("<div class='clear'></div>");
            });
        };
        
        /* search form */
        
        jQuery('#search').toggle(
            function () {jQuery('#searchbox').animate({opacity:'toggle', marginLeft:'-210px'},500);},
            function () {jQuery('#searchbox').animate({opacity:'toggle', marginLeft:'-200px'}, 500);}
        );
        
        var $searchinput = jQuery("#header #searchbox input");
        var $searchvalue = $searchinput.val();
        
        $searchinput.focus(function(){
            if (jQuery(this).val() == $searchvalue) jQuery(this).val("");
        }).blur(function(){
            if (jQuery(this).val() == "") jQuery(this).val($searchvalue);
        });
        
    
        jQuery('ul.sf-menu li ul').append('<li class="bottom_bg noLava"></li>');
        
        var active_subpage = jQuery('ul.sf-menu ul li.current-cat, ul.sf-menu ul li.current_page_item').parents('li.top-level').prevAll().length;
        var isHome = 1; 
        
        if (active_subpage) jQuery('ul.sf-menu').lavaLamp({ startItem: active_subpage });
        else if (isHome === 1) jQuery('ul.sf-menu').lavaLamp({ startItem: 0 });
        else jQuery('ul.sf-menu').lavaLamp();
            
        
                    
            /* featured slider */
            
            jQuery('#spotlight').cycle({
                timeout: 0,
                speed: 1000, 
                fx: 'fade'
            });
            
            var $featured_item = jQuery('div.featitem');
            var $slider_control = jQuery('div#f_menu');
            var ordernum;
            var pause_scroll = false;
            var $featured_area = jQuery('div#featured_content');            
     
            function gonext(this_element){
                $slider_control
                .children("div.featitem.active")
                .removeClass('active');
                this_element.addClass('active');
                ordernum = this_element.find("span.order").html();
                jQuery('#spotlight').cycle(ordernum - 1);
            } 
            
            $featured_item.click(function() {
                clearInterval(interval);
                gonext(jQuery(this)); 
                return false;
            });
            
            jQuery('a#previous, a#next').click(function() {
                clearInterval(interval);
                if (jQuery(this).attr("id") === 'next') {
                    auto_number = $slider_control.children("div.featitem.active").prevAll().length+1;
                    if (auto_number === $featured_item.length) auto_number = 0;
                } else {
                    auto_number = $slider_control.children("div.featitem.active").prevAll().length-1;
                    if (auto_number === -1) auto_number = $featured_item.length-1;
                };
                gonext($featured_item.eq(auto_number));
                return false;
            });

                
            
            var auto_number;
            var interval;
            
            $featured_item.bind('autonext', function autonext(){
                if (!(pause_scroll)) gonext(jQuery(this)); 
                return false;
            });
            
                    
        });
//]]>
</script>