Ваяс,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
$(function(){
var s = $(".b-pp_map");
$(".test").click(function() {
var k = $("<script/>" ).appendTo(s) ;
k[0].src = "http://api-maps.yandex.ru/services/constructor/1.0/js/?sid=8lpbr_hfrBDmXTQs4bKkFezs4YH6kFW6&width=600&height=450"
});
});
</script>
</head>
<body>
<div class="b-pp_map"></div>
<div class="test">click</div>
</body>
</html>