<input type="text" name="name">
<input type="text" name="phone">
<input type="text" name="address">
<div data-block="name">Имя <span></span></div>
<div data-block="phone">Телефон <span></span></div>
<div data-block="address">Адрес <span></span></div>
$(document).on('keyup', 'input' ,function(){
var text = $(this).val();
var inputName = $(this).attr('name');
$('[data-block="'+ inputName +'"] span').text(text);
})
$('.res').text(text);