kowapos, работает однако
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>tooltip demo</title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
<script src="http://code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
</head>
<body>
<textarea id="test" name=""><div class="elementList" id = "project' + data.projects[key].id_project + '">
<div class="ObjectTitle">
<span class="glyphicon glyphicon-folder-open"></span> ' + data.projects[key].name + '
</div>
<div class="dropdown objMenu">
<a data-toggle="dropdown">
<span class="tools glyphicon glyphicon-cog"></span>
</a>
<ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
<li><a href="javascript:;">Совместный доступ</a></li>
<li><a href="javascript:;">Маркер</a></li>
<li><a href="javascript:;">Добавить в "Избранное"</a></li>
<li><a href="javascript:;">Информация</a></li>
</ul>
</div>
</div>
</textarea>
<script>
var data = $('textarea').val()
$('body').append($(data));
alert($('.elementList').size());
</script>
</body>
</html>