[@robkk Moderator 11 years, 8 months ago]

you can use the bbpress views, and put the views widget in your sidebar

see if this works , put this function into your functions.php

function rkk_register_custom_views() {
bbp_register_view( 'desc', __( 'Z-A' ), array('orderby'=> 'title', 'order' => 'DESC'), false );
bbp_register_view( 'asc', __( 'A-Z' ), array('orderby'=> 'title', 'order' => 'ASC'), false );
bbp_register_view( 'date-asc', __( 'Date ASC' ), array('orderby'=> 'date', 'order' => 'ASC'), false );
bbp_register_view( 'date-desc', __( 'Date DESC' ), array('orderby'=> 'date', 'order' => 'DESC'), false );
}
add_action( 'bbp_register_views', 'rkk_register_custom_views' );