Creation navigation function array in bootstrap

createNav

function createNavigation(){
	$currentFile = Explode('/', $_SERVER["PHP_SELF"]);

	if(count($currentFile)>2){
		if($currentFile[count($currentFile) - 1]=='index.php'){
			$currentFile = '/'.$currentFile[count($currentFile) - 2].'/';
		} else {
			$currentFile = '/'.$currentFile[count($currentFile) - 2].'/'.$currentFile[count($currentFile) - 1];
		}
		
	} else {
		if($currentFile[count($currentFile) - 1]=='index.php'){
			$currentFile = '/';
		} else {
			$currentFile = '/'.$currentFile[count($currentFile) - 1];
		}
		
	}
	
	// List of pages
	$pages = array(
	 array("file" => "/", "title" => "Home"),
	 array("file" => "/services/", "title" => "Services", "children" => array(
		 array("file" => "/services/something", "title" => "Sub"),
	 )),
	 
	 array("file" => "/about_OEE/", "title" => "About OEE"),
	 array("file" => "/contact/", "title" => "Contact OEE"),
	);
	
	
	$menuOutput = '<ul class="nav navbar-nav navbar-right">';
	foreach ($pages as $page) {
		
	 $activeClassAppend = ($page['file'] == $currentFile) ? ' active' : "";
	 $subClassAppend = isset($page['children']) ? ' dropdown-toggle' : "";
	 $subDataAppend = isset($page['children']) ? ' data-toggle="dropdown"' : "";
	 $subSpanAppend = isset($page['children']) ? ' <span class="caret"></span>' : "";
	 
	 if (isset($page['children'])){
		 
		 $activeSubAppend = ($page['file'] == $currentFile) ? ' class="active"' : "";
		 $childen = '<ul class="dropdown-menu" role="menu">';
		 
		 foreach ($page['children'] as $child) {
			 $childen .= '<li' . $activeSubAppend . '><a href="' . $child['file'] . '">'.$child['title'].'</a></li>'; 
			}		 
		 $childen .= '</ul>';
	 
	 }
	 
	 $menuOutput .= '<li class="'.$activeClassAppend.' '.$subClassAppend.'"><a href="'.$page['file'].'" '.$subDataAppend.'>'.$page['title'].' '.$subSpanAppend.'</a>'
			.@$childen.
			'</li>'; 
	}   
	$menuOutput .= '</ul>';
	
	
	
	return $menuOutput;
}

header

<header class="header">
<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
  <div class="container">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="/"><img src="/images/logo.png" alt="logo" width="125" height="29" /></a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">  
	      <?php echo createNavigation(); ?>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>
</header>