How you can Hide a category title or description at wordpress using jquery or css?

Thanks.

apply display:none towards the element.

when the category title was

    <h3 class="single_cat_title">Title here</h3>

You'd add

    .single_cat_title {display:none;}

In jQuery, make use of the selector.hide() function.

    $('.single_cat_title').hide();

Please provide more particulars inside your problem the next time, it can help us, that will help you!