<a class="btn btn-default changChick" οnclick="changChick(this)">高</a>

<a class="btn btn-default changChick" οnclick="changChick(this)">中</a>

<a class="btn btn-default changChick" οnclick="changChick(this)">低</a>

<script>

function changChick(target){

　　$.each($(".changChick"), function() {

　　　　$(this).removeClass("bg-light-blue");

　　});

　　$(target).addClass("bg-light-blue");

}

</script>