When you change the categories in the Site Directory, do the following to make the new categories available on the Create Site page:

1. On the Top Navigation bar of the portal site, click Sites to open the Site Directory.
2. On the Site Actions menu, point to Site Settings, and then click Modify All Site Settings.
3. In the Site Administration section, click Site libraries and lists, and then click Customize Sites.
4. On the Customize Sites page, in the Views section, click Site Creation Categories.
5. In the Columns section, select the check boxes for the columns (categories) that you want to be displayed on the Create Site page, and clear the check boxes of those that you want to remove.
6. For each column that you want to display, select a Position from Left number to arrange how the categories are displayed.
7. Select the other column formatting options that you want, and then click OK.

When you finish, test your new categories by opening the Create Site page.