如何打印表单数据而不是它们的值？

I trying to print a form data with a shortcode but the code is printing their value

I have a Wordpress site that I need to print a form data with a shortcode, but the system is printing their value instead. The first block is my form. Second block is my shortcode content.

<div class="cidade">
<form action="" method="post">
    <select id="cidade2" name="cidade" onchange="submit();">
        <option value="augustopestana-rd2">Augusto Pestana</option>
</select>
</form>
</div>

<?php echo $_POST['cidade']; ?>

And finally I past the shortcode into a wordpress widget expeting to print "Augusto Pestana" but it's printing "augustopestana-rd2".