Here you go, fixed it:
PAGE 1: index.html
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.css">
<script type="text/javascript" src="http://dev.jtsage.com/cdn/spinbox/latest/jqm-spinbox.min.js"></script>
</head>
<body>
<div data-role="page">
<h1 id="header">IT Cafe</h1>
<a href="#hot" data-role="button" data-inline="true" data-icon="home" data-iconpos="notext" id="homeicon" ></a>
<a href="#shop" data-role="button" data-inline="true" data-icon="shop" data-iconpos="notext" id="shopicon" ></a>
<nav data-role="navbar">
<ul>
<li><a href="#hot" class="ui-btn-active ui-state-persist" >Coffee(Hot)</a></li>
<li><a href="#ice" >Coffee(Ice)</a></li>
<li><a href="e#tc" >Etc</a></li>
</ul>
</nav>
<form name="f" method="post" action="submit.php">
<input type="text" name="test" />
<input type="submit" value="submit" />
</form>
</div>
</body>
</html>
PAGE 2: submit.php
<!DOCTYPE html>
<html>
<head>
<title>jQuery MOBILE</title>
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0"/>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css" />
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script>
</head>
<body>
<div data-role="page" id="second">
<div data-theme="a" data-role="header">
<h3>Page 2</h3>
</div>
<div data-role="content">
You Selected:
<?php
$var = $_POST['test'];
if(isset($var)){echo $var;}
?>
</div>
</div>
</body>
</html>
4
solved jquery mobile & php