The construction is κακὰ λέγειν + acc.=to speak ill about someone.
LSJ has:
“λέγειν τινά τι say something of another, esp. κακὰ λ. τινά speak ill of him, revile him, Hdt. 8.61; ἀγαθὰ λ. τινάς Ar. Ec. 435; τὰ ἔσχατα, τὰ ἀπόρρητα λ. ἀλλήλους, X. Mem. 2.2.9, D. 18.123; also εὖ or κακῶς λ. τινά, A. Ag. 445 (lyr.), S. El. 524, cf. 1028; εὖ λ. τὸν εὖ λέγοντα X. Mem. 2.3.8.”
http://discourse.textkit.com/t/trouble-with-one-word-in-a-passage/17515/1