[option value="dvě" [?php echo ($_POST['test']=="dve" ? "selected" : ""); ?]]dve[/option]

<form name="jmeno" method="POST" action="template.php" enctype="multipart/form-data" accept-charset="UTF-8" accept="text/plain">

<select onchange="this.form.submit()" name="test">

<option value="jedna" selected>jedna</option>

<option value="dvě">dvě</option>

<option value="tři">tři</option>

<option value="čtyři">čtyři</option>

<option value="pět">pět</option>

</select>

</form>