sp15_nav_scripts.js

$(document).ready(function(){
    
    var scriptBase = _spPageContextInfo.webAbsoluteUrl + "/_layouts/15/";	
    
    $.getScript(scriptBase + "sp.runtime.js",function(){
    		
        $.getScript(scriptBase + "sp.js",function(){
        		
            $.getScript(scriptBase + "sp.publishing.js", modifyNavigation);
	
        });
    });
});