You can define menu in adminCP in file Install.php
protected function setOthers() { $this->admincp_menu = [ "Manage Campaigns" => "betterads", "Add Placement" => "betterads.addplacement", "Manage Placements" => "betterads.placement", "Manage Invoice" => "betterads.invoice", "Manage Sponsorships" => "betterads.sponsor", ];//Do not put admincp here $this->admincp_route = 'admincp.betterads';//must be begun with admincp }