Your task is one of many excellent applications for using Access Point Templates.
AP Templates permit you to make changes in bulk to access points.
From the WCS, to to Configure->Access Point Templates.
From the dropdown, select "Add template" and click "GO".
Name it "Reset APs" (description is optional, but helpful)
At the bottom of the "AP Parameters" tab/page, check the "Reboot AP" check box.
Click on the "Select APs" tab.
Select the APs that you wish to reset (you can select "ALL" from the drop down on the upper left-hand side of the dialog box and click on the SEARCH button.
Place a check in (or uncheck) each checkbox for each AP you wish to reset. The operation of the AP template (in this case, simply resetting the AP(s)) will be performed on each AP where the check box is checked.
Click APPLY to execute the template and reset your list of APs.
Note: This is only a small example of the power of Access Point Templates.
I use them all the time and strongly recommend getting more familiar with them as they can save you a significant amount of time and effort!