There are a lots of layers in my projects. Previously I have renamed a layer with "system" and to that layer I have set visibility hidden. I want to show that layer again but I have to search manually by scrolling the layer palettes and I can do that. But I want to know just that is there find dialog box which can search layers by name etc.
Solution to your problem is in Photoshop CS6 where you can select layers by Type - Name - Attribute etc. like in above answer if you don't have latest version. Then i have tip for you i.e. i use to do very often manage your layers by Grouping related layers this helps a lot to apply some thing on a multiple layers. This even helps if you have layers in different groups. Better management smart and timely output. Below is the link for further help.