The simplest answer is to allow, in account settings, the administrators to define the value of Site_URL to be their own designated website url rather than the default from wild apricot. This way whenever the system makes a call to this value - it can point to either the wild apricot site or to the members site.
Since this isn't possible today - we had to over write all system generated emails that reference the site_url macro to reference our actual site url in every membership level. So, if we are stuck with this as our only option - maybe you could just let us edit the automated email that the system generates so that we can over write the value like we have to do on all other letters currently.
The simplest answer is to allow, in account settings, the administrators to define the value of Site_URL to be their own designated website url rather than the default from wild apricot. This way whenever the system makes a call to this value - it can point to either the wild apricot site or to the members site.
Since this isn't possible today - we had to over write all system generated emails that reference the site_url macro to reference our actual site url in every membership level. So, if we are stuck with this as our only option - maybe you could just let us edit the automated email that the system generates so that we can over write the value like we have to do on all other letters currently.