Dynamic String Value iRule

Yes, try the iRule below.

when HTTP_REQUEST {
    if { [string tolower [HTTP::host]] equals "example1.com" && [string tolower [HTTP::uri]] starts_with "/administration/data/value" } {
        HTTP::respond 302 noserver Location "https://example2.com[string map -nocase {"administration" "finance"} [HTTP::uri]]"
    }
}

Output:

[nvsluis@ansible ~]$ curl -v --resolve example1.com:80:192.168.178.201 http://example1.com/administration/data/value/blah
* Added example1.com:80:192.168.178.201 to DNS cache
* About to connect() to example1.com port 80 (#0)
*   Trying 192.168.178.201...
* Connected to example1.com (192.168.178.201) port 80 (#0)
> GET /administration/data/value/blah HTTP/1.1
> User-Agent: curl/7.29.0
> Host: example1.com
> Accept: */*
>
* HTTP 1.0, assume close after body
< HTTP/1.0 302 Moved Temporarily
< Location: https://example2.com/finance/data/value/blah
* HTTP/1.0 connection set to keep alive!
< Connection: Keep-Alive
< Content-Length: 0
<
* Connection #0 to host example1.com left intact
[nvsluis@ansible ~]$

Have fun,

     --Niels