2.5 year old crying like a banshee when put to bed

[pigletmania]

It is really tiring, these past couple of night dd1 2.5 years has started crying like a maniac and refuses to go down into her bed at bedtime. She screeches for mummy and daddy, clings onto us for dear life and is only comforted when on us, when put back into bed she wails like its nobodies business. I dont know what to do, this does not happen during the day at naptime

How long id she sleeping for in the day? It may be that she needs a shorter nap so that she is more tired come bed time? That is what happened with my daughter.