$term_id = get_query_var('cat'); // the current category ID
    
    $my_fields = get_option('my_category_fields_option');
    echo $my_fields[$term_id]['my_title']; // the title corresponding to the current category

(assuming you're talking about https://wordpress.stackexchange.com/questions/6549/any-examples-of-adding-custom-fields-to-the-category-editor/6599#6599)