Can I Use IF Inside A Query?

Is it possible to use IF inside a query, in the WHERE statement? I started with the query right below, but I onlye got error. After testing and rewriting a lot I ended up with the last query. But there hast to be a better, smarter, more elegant way to write this query? Any hint?

 ALTER PROCEDURE [dbo].[LinksInCategory]
-- =============================================
-- Description:    Return all links from the requested category.
-- =============================================
    (@CategoryId int,
    @AdminFilter bit)
AS
    SELECT
        Link.Id, Link.Title, Link.Url, Link.ShortText, Link.Hidden
    FROM
        Link
    WHERE
        Link.Parent = @CategoryId
        IF (@AdminFilter = 1)
            print 'AND Link.Hidden = @AdminFilter'
    ORDER BY Link.Title
 
 
 ALTER PROCEDURE [dbo].[LinksInCategory]
-- =============================================
-- Description:    Return all NOT hidden links from the requested category.
--                If in Administrators role the return ALL links (the hidden ones also).
-- =============================================
    (@CategoryId int,
    @AdminFilter bit)
AS
    IF (@AdminFilter = 1)
    BEGIN
        SELECT
            Link.Id, Link.Title, Link.Url, Link.ShortText, Link.Hidden
        FROM
            Link
        WHERE
            Link.Parent = @CategoryId
        ORDER BY Link.Title
    END
    ELSE
    BEGIN
        SELECT
            Link.Id, Link.Title, Link.Url, Link.ShortText, Link.Hidden
        FROM
            Link
        WHERE
            Link.Parent = @CategoryId AND
            Link.Hidden = @AdminFilter
        ORDER BY Link.Title
    END
 
Regards, Sigurd