Covering low garden wall

I need some advice on covering up a long, low garden wall.

The wall retains the garden borders all around the front garden. It's total length is probably 25 meters. It faces into the garden.

The wall is only two brick rows high. It is covered in cladding which can only be described as crazy paving. The cladding is loose and falling off, plus it's dated and would not look good even if repaired. The brick work underneath is made up of partials and so does not look attractive either.

In short - it needs some sort of covering.

I can think of a few options; rendering, tiling and perhaps even covering in low wood panelling. I want the cheapest, simplest and fastest option to tidy it up.

Any advice is much appreciated. Has anyone done anything similar?

Thanks.