forms

HTML

<div class="group" id="group">
						<label>Услуга*<br><input type="text" name="service" required/></label>
						<label>Цена*<br><input type="text" name="price" required/></label>
					<input type="button" class="addbtn" id="add" value="Добавить">
					</div>

JavaScript

$(document).ready(function () {
	$('.addbtn').click(function(){
		var str = '<label>Услуга*<br><input type="text" name="service1[]" /></label>    <label>Цена*<br><input type="text" name="price1[]" required/></label>';
	/*	str+= '<label>Услуга*<br><input type="text" name="service1[]" /></label>    <label>Цена*<br><input type="text" name="price1[]" required/></label> ';
		str+= '</li>';*/
		$(this).before(str);
	});
});