You do not the Options Page plugin for this to work. I’ll work on a patch to fix this, in the meantime, replace the file code with this. (simply adding the class_exists() check)
if (class_exists('acf_options_page'))
{
class umt_acf_options_page extends acf_options_page
{
var $umt;
function __construct($parent)
{
$this->umt = $parent;
// Setup Addon
global $acf;
if (isset($acf->options_page))
{
// call the original acf_options_page constructor
parent::__construct($acf);
// setup initiation procedure
add_action('init',array($this,'init'),99);
// setup register options page init
add_action('admin_init',array($this,'umt_admin_init'));
}
else
{
trigger_error("ACF Options Page support for Ultimate Metabox Tabs has become broken. Please contact the developer. For now, disable the extension.");
}
}
function init()
{
global $acf;
// remove the admin menu hook
remove_action('admin_menu', array($acf->options_page,'admin_menu'));
// override the original options page
$acf->options_page = $this;
}
function admin_body_class($classes)
{
$classes = str_replace(" umt_no_margin","",$classes);
return $classes;
}
function umt_admin_init()
{
// register metatabs page
umt_register_settings_page($this->umt_slug,$this->umt_name);
}
function admin_head() {
$this->umt->metatab_load_settings_page($this->umt_slug);
$this->umt->admin_head();
add_filter('admin_body_class',array($this,'admin_body_class'));
parent::admin_head();
}
function admin_print_scripts() {
$this->umt->metatab_load_settings_page($this->umt_slug);
parent::admin_print_scripts();
// remove original filter, only if on the 'options page'
remove_filter('richedit_pre', array($this->umt,'richedit_pre'),99);
$this->umt->admin_print_scripts();
}
function admin_print_styles() {
parent::admin_print_styles();
$this->umt->admin_print_styles();
}
function html()
{
parent::html();
// append metabox tabs
$this->umt->metatab_create();
}
}
}
