Hijack the WordPress Admin menu for a button


//adding a rewind now on the admin bar
add_action( 'admin_bar_menu', 'custom_admin_bar_link', 100 );




/**
* custom_admin_link
*
* @since 1.0.0
* @param @url $adminbar
*/

function custom_admin_bar_link( $admin_bar ) {

$admin_bar->add_menu( array(
'id' => 'tools',
'title' => $cuslink,
'href' => 'tools.php', //go to some url
'meta' => array(
'title' => __('Visit Tools'),
),
));
}