Tip for quickly symlinking...

[njt1982]

I did this to make all the symlinks:

for i in files fragmentation hit_miss purge rates usage mem_size user_hit_miss user_entries user_rates; do sudo ln -s /path/to/php_apc_ /etc/munin/plugins/php_apc_$i; done

You can just add and remove the graphs from the for params as needed.