<section class="main-content">
<section class="resultwrap"></section>
<section class="filterwrap"></section>
</section>



 $('html').on('click', '.backtoparam', function(e) {

        console.log('returnToFilter');
        e.stopPropagation();
        e.preventDefault();

        $('.resultwrap').hide();
        $('.filterwrap').fadeIn(300);

return false;


});

<div class="main-content">
<section class="resultwrap">
     One
</section>
<section class="filterwrap">
     Two
</section>
</div>
<a class="backtoparam" href="#">Link</a>

<script>
   $(document).on('click','.backtoparam',function(){
       $('.resultwrap,.filterwrap').toggle();
       return false;
   });
</script>