Next time you are at a petshop, buy some filter foam and stick it where the water flows out. This will help reduce the current a bit.
I have my filter in the corner and I also stuck one of Zoo Meds betta plants right up next to it. They come with suction cups and should be pretty cheap - about $2 for the plant. I stuck it up right near the filter on the side and had it so that one of the leaves rests on the outflow lip. This also helps reduce the current a bit.
They have different ones, but this is the one I use as the "branches" work better then some of the other types of plants they have.
It is plastic but the ends are pretty soft.
Here is a pic of it, sort of...you can see the filter in the background with the plastic plant and a few silk plants. The current dosent push him around at all