Add the following to the file AnnyConnectProfile.xml in directory "%ProgramData%\Cisco\Cisco AnyConnect Secure Mobility Client\Profile" to get multiple hosts to choose from in your AnyConnect drop down list.
<?xml version="1.0" encoding="UTF-8"?>
<AnyConnectProfile xmlns="http://schemas.xmlsoap.org/encoding/">;
<ServerList>
<HostEntry>
<HostName>Hostname 1</HostName>
<HostAddress>Host 1</HostAddress>
</HostEntry>
<HostEntry>
<HostName>Hostname 2</HostName>
<HostAddress>Host 2</HostAddress>
</HostEntry>
</ServerList>
</AnyConnectProfile>