Database Design Best Practice help

I have a question about database design best pratice.

In my db I have about one hundred tables like this:

code
description

To avoid to have a so great number of similar tables in the db I wonder if it is a good idea to unify all these tables in one big table like this:

id
code
table_ name
description

The advantages are:

1. only one table in the db instead of 100
2. only one controller to manage the table

Could this be a way to enhance db performance? Is there any negative point that I don't see?

Thanks for any comments.

j

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