A태그 클릭시 자동으로 관련  radio버튼이 선택되는 jQuery 

구현하기

<script>

$(function() {

$(".single").on("click", function(){

$("input:radio[value='single']").prop("checked",true);

});

$(".couple").click(function(){

$("input:radio[value='couple']").attr("checked", true);

});

$(".master").click(function(){

$("input:radio[value='master']").attr("checked", true);

});

});

</script>

<a href ="javascript:" id="apply" class="single">single 신청하기 </a>&nbsp;

<a href ="javascript:" id="apply" class="couple">couple 신청하기 </a> &nbsp;

<a href ="javascript:" id="apply" class="master">master 신청하기 </a> <br/><br/>

<label><input type="radio" name="service_type" value="single"  id="single">single </label>

<label><input type="radio" name="service_type" value="couple"  id="single">couple </label>

<label><input type="radio" name="service_type" value="master"  id="single">master </label>