[Dilettante_Pro]

А вот так?

<input name="premium" id="premium" type="checkbox">
<label class="label_check" >Показать</label>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script>
$(function(){
	$('.label_check').click(function(){
		var url = '';
		if($('#premium').prop('checked')) {
			url = '/catalog/?category=premium';
		} else {
			url = '/catalog/';
		}
                    alert(url);
	});
});
</script>