She is a very smart little girl and will be going to kindergarten this year. I am worried that she is taking too long to outgrow this stage. Twenty five percent of four year olds wet the bed, so your daughter is clearly within the normal range. She will most likely outgrow this, so the main strategy you should employ is to make sure she does not become unduly anxious about this problem. Bedwetting is a common problem experienced by toddlers and school aged children.
Most children overcome bed wetting between the ages of six and ten.
Be sure she starts the night with an empty bladder by going to the bathroom right before she goes to bed. Respond positively to dry nights, but give sympathy, not criticism, to wet nights. Don't allow siblings to tease her about bed wetting. Watch kids controlling behavior of breath holding. Most children do not get enough water in their diet.