for %q in (*.cgi *.pl) do (
   perl -pi.bak -e"s{^#!/usr/bin/perl}{#!/usr/local/bin/perl}" "%q"
)

[download]

Change for to for /r for a recursive solution.

Update: Simplified solution

In reply to Re^2: Automatically Rewrite Shebang Line on Multiple Files by ikegami
in thread Automatically Rewrite Shebang Line on Multiple Files by spickles

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