'parent', 'id' => 'term_id');
function start_lvl(&$output, $depth=0, $args=array()) {
$output .= "\n\n";
}
function end_lvl(&$output, $depth=0, $args=array()) {
$output .= "
\n";
}
function start_el(&$output, $item, $depth=0, $args=array()) {
$output .= "".esc_attr($item->name);
}
function end_el(&$output, $item, $depth=0, $args=array()) {
$output .= "\n";
}
}
$elements = get_categories();
$walker = new Walker_Simple_Example;
echo $walker->walk($elements, 0);