from keras import backend as K

inp = model.input                                           # input placeholder
outputs = [layer.output for layer in model.layers]          # all layer outputs
functor = K.function([inp, K.learning_phase()], outputs )   # evaluation function

# Testing
test = x_test[0][np.newaxis,...]
layer_outs = functor([test, 1.])
#print layer_outs