// Abschalten der Dashboard-Widgets
function ah_remove_dashboard_widgets() {
    global $wp_meta_boxes;
 
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);
 
} 
add_action('wp_dashboard_setup', 'ah_remove_dashboard_widgets' );

// Ein eigenes Dashboard-Widget erstellen
function ah_custom_dashboard_widgets() {
global $wp_meta_boxes;
wp_add_dashboard_widget('custom_help_widget', 'Theme Support', 'ah_custom_dashboard_help');
}
function ah_custom_dashboard_help() {
echo '<p>Hier den Text oder code rein.</p>';
}
add_action('wp_dashboard_setup', 'ah_custom_dashboard_widgets');