{* @event backend_header *}
{* $return[%app_id%]['header_top'] *}
{if !empty($header_top)}{foreach $header_top as $_}{$_}{/foreach}{/if}
{if !empty($include_wa_push)}
{/if}
{* @event backend_header *}
{* $return[%app_id%]['header_bottom'] *}
{if !empty($header_bottom)}{foreach $header_bottom as $_}{$_}{/foreach}{/if}