//add span text to the show block
$("#btn1").click(function () {
$("span").appendTo("#showBlock");
});
<body>
<span>this is input block.</span>
<!-- add new item Dynamically in the show block -->
<div id="showBlock">
Input:<input type="text" name="test[]" />
</div>
<!-- click the button to add new item -->
<input type="button" id="btn1" value="addtext"/>
</body>