Hello Lam,
Beans is very easy to customize the generated html.
https://www.getbeans.io/documentation/markup-and-attributes
Something like this in the funtions.php should work. You will need to wrap the output with the html you would like.
add_action( 'beans_site_title_link_append_markup', 'my_function_name' );
function my_function_name() {
echo 'HELLO';
}
Cheers, Maurice