@using (Html.BeginForm("CreateCookie", "AgeScreener", FormMethod.Post, null))
{
    @Html.HiddenFor(x => x.ReturnUrl);
    @Html.HiddenFor(x => x.Day, new { id = "input_day" });
    @Html.HiddenFor(x => x.Month, new { id = "input_month" });
    @Html.HiddenFor(x => x.Year, new { id = "input_year" });														 
													  
							   								  
	<div id="day_container">
		@for (int i = 1; i < 32; i++)
		{
			<a href="#" id="day_@(i)">@i </a>	  
		}
	</div>
	
	<div id="month_container">
		@foreach (var item in Model.MonthList)
		{
			<a href="#" id="day_@(item.Value)">@item.Name </a>
		}
	</div>
	
	<div id="year_container">
		@for(int i= DateTime.Now.Year; i > DateTime.Now.Year - 100; i--)
		{
			<a href="#" id="year_@(i)">@i </a>
		}
	</div>
	
	@Html.DropDownListFor(x => x.Country, Model.CountriesSelectListItems);    																	  																  
	
	<input type="submit" value="Submit" />
	
}

Jquery :

$(document).ready(function () {

	var day;
	$('#day_container a').click(function () {
		day = $(this).attr('id').split('_')[1];
		$('#day_container a').removeClass('selected');
		$(this).addClass('selected');
		$('#input_day').val(day);

	});

	var month;
	$('#month_container a').click(function () {
		month = $(this).attr('id').split('_')[1];
		$('#month_container a').removeClass('selected');
		$(this).addClass('selected');
		$('#input_month').val(month);
	});

	var year;
	$('#year_container a').click(function () {
		year = $(this).attr('id').split('_')[1];
		$('#year_container a').removeClass('selected');
		$(this).addClass('selected');
		$('#input_year').val(year);
	});

}); 

css style :

.selected{
font-weight:bold;
}