ou(=toi, w)= a)/ndrej )Aqhnai=oi, tau/thn th\n fh/mhn kataskeda/santej, oi( deinoi/ ei)si/n mou kath/goroi

I do not understand how ei)si/n mou can be placed in-between oi( deinoi/ and kath/goroi. I have looked at commentary and realize that oi( deinoi/ kath/goroi is the predicate, but how can ei)sin be in the attributive position?

( Still having problems to type in Greek?! )

If you change the order of the words you will find what happens: οὗτοι εἰσὶν οἱ δεινοί μου κατήγοροι. Plato (as is usual in Greek texts) follows the order of importance; he wanted to stress that the accusers are δεινοί, so he moves the epithet before the verb and the relevant noun.

I was not aware that a verb could be placed in between an article and its noun. I know postpositives can be, but I have never seen any reference to verbs being placed thus.

You grow old, still learning!