Using Loop and Sorting y Category

<!-- Telephone Category -->
							<?php $phone = new WP_Query();
							$phone->query('showposts=10&cat=25'); //Telephone
							if ($phone->have_posts()); ?>
							<h2>Telephone</h2>
							<table id="equip-table">
								<tr>
									<th style="width: 385px">Item Description</th>
									<th style="width: 39px">Quantity</th>
									<th style="width: 15px;">&nbsp;</th>
									<th style="width: 60px; text-align: center;">
									Price</th>
								</tr>
							</table>
							<!-- Telephone Query -->
						 <?php
						 while ($phone->have_posts()) : $phone->the_post();
                         get_post_meta($post->ID, 'Price', true); ?><?php get_post_meta($post->ID, 'Quantity', true);
                         ?>
							<div>
								<table id="equip-table">
									<tr>
										<td style="width: 385px;">
										<a href="<?php the_permalink() ?>"><?php the_title(); ?>
										</a></td>
										<td style="width: 39px"><?php echo get_post_meta($post->ID, 'Quantity', true); ?>
										</td>
										<td style="width: 15px;">$</td>
										<td style="width: 60px; text-align: right;">
										<?php echo get_post_meta($post->ID, 'Price', true); ?>
										</td>
									</tr>
								</table>
							</div>
							<?php endwhile; ?><br />
							<!-- End Telephone Category -->

Each category has similar code. The problem of doing it this way is that all of the blank categories are displayed. I don’t want the blank categories to show. What to do?