SolomonRei,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(function() {
$('.customCursor').on('click', function(e) {
var s = $(this).children('.menuItem');
s.stop().fadeToggle(800,'linear');
});
});
</script>
</head>
<body>
<ul class = "list-group">
<li class="list-group-item customCursor">
<p class="grey-text">Model</p>
<ul class = "list-group list-group-flush menuItem">
<li class="list-group-item submenuItem">BMW</li>
<li class="list-group-item submenuItem">Audi</li>
</ul>
</li>
<li class="list-group-item customCursor">
<p class="grey-text">Year</p>
<ul class = "list-group list-group-flush menuItem">
<li class="list-group-item submenuItem">2000</li>
<li class="list-group-item submenuItem">2001</li>
</ul>
</li>
<li class="list-group-item customCursor">
<p class="grey-text">Exterior color</p>
<ul class = "list-group list-group-flush menuItem">
<li class="list-group-item submenuItem">Red</li>
<li class="list-group-item submenuItem">Blue</li>
</ul>
</li>
</ul>
</body>
</html>