display category shortcode in a correct possition

Hi,
I wanted to implement a shortcode that would list all child categories assigned to a post. The name of parent category is passed as a shortcode parameter. I wrote a function in functions.php of the child theme and registered the shortcode. So far so good it works when I use the shortcode alone.
However, when I try to write the shortcode in a text, something like:

“The project is in these phases: [cats1 type=”project-phase”]”

¨Then the categories are always displayed first and then all the text.

Is there a way how to place the category listing in a correct position?

Here is the code I have:

function cats1($type){
    extract(shortcode_atts(array(
        'type' => 'type'
    ), $type));
  $category = get_category_by_slug($type);
  $catid = $category->term_id;
  /*return $catid;*/
    $args = array(
	'orderby'            => 'name',
	'order'              => 'ASC',
        'style'              => 'none',
	'show_count'         => 0,
	'hide_empty'         => 1,
	'use_desc_for_title' => 0,
	'child_of'           => $catid,
	 );
  $categories = get_categories($args);
   foreach($categories as $category) {
    echo '<a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "Look at all %s" ), $category->name ) . '" ' . '>' . $category->name.'</a> | ';
    }
}
add_shortcode('cats1', 'cats1');